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class="vector-toc-numb">1.3</span> <span>Éléments chimiques</span> </div> </a> <ul id="toc-Éléments_chimiques-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Corps_simples" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Corps_simples"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Corps simples</span> </div> </a> <ul id="toc-Corps_simples-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Corps_composés" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Corps_composés"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Corps composés</span> </div> </a> <ul id="toc-Corps_composés-sublist" class="vector-toc-list"> <li id="toc-Composés_moléculaires" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Composés_moléculaires"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5.1</span> <span>Composés moléculaires</span> </div> </a> <ul id="toc-Composés_moléculaires-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Solides_ioniques" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Solides_ioniques"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5.2</span> <span>Solides ioniques</span> </div> </a> <ul id="toc-Solides_ioniques-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Notes_et_références" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes_et_références"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Notes et références</span> </div> </a> <button aria-controls="toc-Notes_et_références-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Afficher / masquer la sous-section Notes et références</span> </button> <ul id="toc-Notes_et_références-sublist" class="vector-toc-list"> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Références" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Références"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Références</span> </div> </a> <ul id="toc-Références-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Voir_aussi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voir_aussi"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Voir aussi</span> </div> </a> <button aria-controls="toc-Voir_aussi-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Afficher / masquer la sous-section Voir aussi</span> </button> <ul id="toc-Voir_aussi-sublist" class="vector-toc-list"> <li id="toc-Articles_connexes" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Articles_connexes"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Articles connexes</span> </div> </a> <ul id="toc-Articles_connexes-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Sommaire" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Basculer la table des matières" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Basculer la table des matières</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Masse molaire</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Aller à un article dans une autre langue. Disponible en 73 langues." > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-73" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">73 langues</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Mol%C3%AAre_massa" title="Molêre massa – afrikaans" lang="af" hreflang="af" data-title="Molêre massa" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Masa_molar" title="Masa molar – aragonais" lang="an" hreflang="an" data-title="Masa molar" data-language-autonym="Aragonés" data-language-local-name="aragonais" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%83%D8%AA%D9%84%D8%A9_%D9%85%D9%88%D9%84%D9%8A%D8%A9" title="كتلة مولية – arabe" lang="ar" hreflang="ar" data-title="كتلة مولية" data-language-autonym="العربية" data-language-local-name="arabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Molyar_k%C3%BCtl%C9%99" title="Molyar kütlə – azerbaïdjanais" lang="az" hreflang="az" data-title="Molyar kütlə" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaïdjanais" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%85%D9%88%D9%84_%D8%AC%D8%B1%D9%85%DB%8C" title="مول جرمی – South Azerbaijani" lang="azb" hreflang="azb" data-title="مول جرمی" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9C%D0%B0%D0%BB%D1%8F%D1%80%D0%BD%D0%B0%D1%8F_%D0%BC%D0%B0%D1%81%D0%B0" title="Малярная маса – biélorusse" lang="be" hreflang="be" data-title="Малярная маса" data-language-autonym="Беларуская" data-language-local-name="biélorusse" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9C%D0%B0%D0%BB%D1%8F%D1%80%D0%BD%D0%B0%D1%8F_%D0%BC%D0%B0%D1%81%D0%B0" title="Малярная маса – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Малярная маса" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D0%B0%D1%80%D0%BD%D0%B0_%D0%BC%D0%B0%D1%81%D0%B0" title="Моларна маса – bulgare" lang="bg" hreflang="bg" data-title="Моларна маса" data-language-autonym="Български" data-language-local-name="bulgare" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Molarna_masa" title="Molarna masa – bosniaque" lang="bs" hreflang="bs" data-title="Molarna masa" data-language-autonym="Bosanski" data-language-local-name="bosniaque" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Massa_molar" title="Massa molar – catalan" lang="ca" hreflang="ca" data-title="Massa molar" data-language-autonym="Català" data-language-local-name="catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Mol%C3%A1rn%C3%AD_hmotnost" title="Molární hmotnost – tchèque" lang="cs" hreflang="cs" data-title="Molární hmotnost" data-language-autonym="Čeština" data-language-local-name="tchèque" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D1%8C_%D0%BC%D0%B0%D1%81%D1%81%D0%B8" title="Моль масси – tchouvache" lang="cv" hreflang="cv" data-title="Моль масси" data-language-autonym="Чӑвашла" data-language-local-name="tchouvache" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Molmasse" title="Molmasse – danois" lang="da" hreflang="da" data-title="Molmasse" data-language-autonym="Dansk" data-language-local-name="danois" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Molare_Masse" title="Molare Masse – allemand" lang="de" hreflang="de" data-title="Molare Masse" data-language-autonym="Deutsch" data-language-local-name="allemand" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Molar_mass" title="Molar mass – anglais" lang="en" hreflang="en" data-title="Molar mass" data-language-autonym="English" data-language-local-name="anglais" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Molmaso" title="Molmaso – espéranto" lang="eo" hreflang="eo" data-title="Molmaso" data-language-autonym="Esperanto" data-language-local-name="espéranto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Masa_molar" title="Masa molar – espagnol" lang="es" hreflang="es" data-title="Masa molar" data-language-autonym="Español" data-language-local-name="espagnol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Molaarmass" title="Molaarmass – estonien" lang="et" hreflang="et" data-title="Molaarmass" data-language-autonym="Eesti" data-language-local-name="estonien" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Masa_molar" title="Masa molar – basque" lang="eu" hreflang="eu" data-title="Masa molar" data-language-autonym="Euskara" data-language-local-name="basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AC%D8%B1%D9%85_%D9%85%D9%88%D9%84%DB%8C" title="جرم مولی – persan" lang="fa" hreflang="fa" data-title="جرم مولی" data-language-autonym="فارسی" data-language-local-name="persan" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Moolimassa" title="Moolimassa – finnois" lang="fi" hreflang="fi" data-title="Moolimassa" data-language-autonym="Suomi" data-language-local-name="finnois" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Masa_molar" title="Masa molar – galicien" lang="gl" hreflang="gl" data-title="Masa molar" data-language-autonym="Galego" data-language-local-name="galicien" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%A1%D7%94_%D7%9E%D7%95%D7%9C%D7%A8%D7%99%D7%AA" title="מסה מולרית – hébreu" lang="he" hreflang="he" data-title="מסה מולרית" data-language-autonym="עברית" data-language-local-name="hébreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AE%E0%A5%8B%E0%A4%B2%E0%A4%B0_%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%B5%E0%A5%8D%E0%A4%AF%E0%A4%AE%E0%A4%BE%E0%A4%A8" title="मोलर द्रव्यमान – hindi" lang="hi" hreflang="hi" data-title="मोलर द्रव्यमान" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Molna_masa" title="Molna masa – croate" lang="hr" hreflang="hr" data-title="Molna masa" data-language-autonym="Hrvatski" data-language-local-name="croate" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Mas_mol%C3%A8" title="Mas molè – créole haïtien" lang="ht" hreflang="ht" data-title="Mas molè" data-language-autonym="Kreyòl ayisyen" data-language-local-name="créole haïtien" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Mol%C3%A1ris_t%C3%B6meg" title="Moláris tömeg – hongrois" lang="hu" hreflang="hu" data-title="Moláris tömeg" data-language-autonym="Magyar" data-language-local-name="hongrois" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%84%D5%B8%D5%AC%D5%A1%D5%B5%D5%AB%D5%B6_%D5%A6%D5%A1%D5%B6%D5%A3%D5%BE%D5%A1%D5%AE" title="Մոլային զանգված – arménien" lang="hy" hreflang="hy" data-title="Մոլային զանգված" data-language-autonym="Հայերեն" data-language-local-name="arménien" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Massa_molar" title="Massa molar – interlingua" lang="ia" hreflang="ia" data-title="Massa molar" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Massa_molar" title="Massa molar – indonésien" lang="id" hreflang="id" data-title="Massa molar" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésien" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Massa_molare" title="Massa molare – italien" lang="it" hreflang="it" data-title="Massa molare" data-language-autonym="Italiano" data-language-local-name="italien" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%A2%E3%83%AB%E8%B3%AA%E9%87%8F" title="モル質量 – japonais" lang="ja" hreflang="ja" data-title="モル質量" data-language-autonym="日本語" data-language-local-name="japonais" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9B%E1%83%9D%E1%83%9A%E1%83%A3%E1%83%A0%E1%83%98_%E1%83%9B%E1%83%90%E1%83%A1%E1%83%90" title="მოლური მასა – géorgien" lang="ka" hreflang="ka" data-title="მოლური მასა" data-language-autonym="ქართული" data-language-local-name="géorgien" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D1%8C%D0%B4%D1%96%D0%BA_%D0%BC%D0%B0%D1%81%D1%81%D0%B0" title="Мольдік масса – kazakh" lang="kk" hreflang="kk" data-title="Мольдік масса" data-language-autonym="Қазақша" data-language-local-name="kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%AA%B0_%EC%A7%88%EB%9F%89" title="몰 질량 – coréen" lang="ko" hreflang="ko" data-title="몰 질량" data-language-autonym="한국어" data-language-local-name="coréen" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D1%8F%D1%80%D0%B4%D1%8B%D0%BA_%D0%BC%D0%B0%D1%81%D1%81%D0%B0" title="Молярдык масса – kirghize" lang="ky" hreflang="ky" data-title="Молярдык масса" data-language-autonym="Кыргызча" data-language-local-name="kirghize" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Massa_molaris" title="Massa molaris – latin" lang="la" hreflang="la" data-title="Massa molaris" data-language-autonym="Latina" data-language-local-name="latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Molio_mas%C4%97" title="Molio masė – lituanien" lang="lt" hreflang="lt" data-title="Molio masė" data-language-autonym="Lietuvių" data-language-local-name="lituanien" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Molmasa" title="Molmasa – letton" lang="lv" hreflang="lv" data-title="Molmasa" data-language-autonym="Latviešu" data-language-local-name="letton" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D1%8F%D1%80%D0%BE%D0%BD%D1%8C_%D1%81%D1%82%D0%B0%D0%BB%D0%BC%D0%BE%D1%81%D1%8C" title="Моляронь сталмось – mokcha" lang="mdf" hreflang="mdf" data-title="Моляронь сталмось" data-language-autonym="Мокшень" data-language-local-name="mokcha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D0%B0%D1%80%D0%BD%D0%B0_%D0%BC%D0%B0%D1%81%D0%B0" title="Моларна маса – macédonien" lang="mk" hreflang="mk" data-title="Моларна маса" data-language-autonym="Македонски" data-language-local-name="macédonien" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AE%E0%B5%8B%E0%B4%B3%E0%B4%BE%E0%B5%BC_%E0%B4%AE%E0%B4%BE%E0%B4%B8%E0%B5%8D" title="മോളാർ മാസ് – malayalam" lang="ml" hreflang="ml" data-title="മോളാർ മാസ്" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D0%B8%D0%B9%D0%BD_%D0%BC%D0%B0%D1%81%D1%81" title="Молийн масс – mongol" lang="mn" hreflang="mn" data-title="Молийн масс" data-language-autonym="Монгол" data-language-local-name="mongol" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Jisim_molar" title="Jisim molar – malais" lang="ms" hreflang="ms" data-title="Jisim molar" data-language-autonym="Bahasa Melayu" data-language-local-name="malais" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Molaire_massa" title="Molaire massa – néerlandais" lang="nl" hreflang="nl" data-title="Molaire massa" data-language-autonym="Nederlands" data-language-local-name="néerlandais" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Molmasse" title="Molmasse – norvégien nynorsk" lang="nn" hreflang="nn" data-title="Molmasse" data-language-autonym="Norsk nynorsk" data-language-local-name="norvégien nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Molar_masse" title="Molar masse – norvégien bokmål" lang="nb" hreflang="nb" data-title="Molar masse" data-language-autonym="Norsk bokmål" data-language-local-name="norvégien bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Massa_molara" title="Massa molara – occitan" lang="oc" hreflang="oc" data-title="Massa molara" data-language-autonym="Occitan" data-language-local-name="occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%AE%E0%A9%8B%E0%A8%B2%E0%A8%B0_%E0%A8%AA%E0%A9%81%E0%A9%B0%E0%A8%9C" title="ਮੋਲਰ ਪੁੰਜ – pendjabi" lang="pa" hreflang="pa" data-title="ਮੋਲਰ ਪੁੰਜ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="pendjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Masa_molowa" title="Masa molowa – polonais" lang="pl" hreflang="pl" data-title="Masa molowa" data-language-autonym="Polski" data-language-local-name="polonais" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Massa_molar" title="Massa molar – portugais" lang="pt" hreflang="pt" data-title="Massa molar" data-language-autonym="Português" data-language-local-name="portugais" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Mas%C4%83_molar%C4%83" title="Masă molară – roumain" lang="ro" hreflang="ro" data-title="Masă molară" data-language-autonym="Română" data-language-local-name="roumain" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D1%8F%D1%80%D0%BD%D0%B0%D1%8F_%D0%BC%D0%B0%D1%81%D1%81%D0%B0" title="Молярная масса – russe" lang="ru" hreflang="ru" data-title="Молярная масса" data-language-autonym="Русский" data-language-local-name="russe" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-se mw-list-item"><a href="https://se.wikipedia.org/wiki/Mol%C3%A1ra_m%C3%A1ss%C3%A1" title="Molára mássá – same du Nord" lang="se" hreflang="se" data-title="Molára mássá" data-language-autonym="Davvisámegiella" data-language-local-name="same du Nord" class="interlanguage-link-target"><span>Davvisámegiella</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Molarna_masa" title="Molarna masa – serbo-croate" lang="sh" hreflang="sh" data-title="Molarna masa" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croate" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Molar_mass" title="Molar mass – Simple English" lang="en-simple" hreflang="en-simple" data-title="Molar mass" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Mol%C3%A1rna_hmotnos%C5%A5" title="Molárna hmotnosť – slovaque" lang="sk" hreflang="sk" data-title="Molárna hmotnosť" data-language-autonym="Slovenčina" data-language-local-name="slovaque" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Molska_masa" title="Molska masa – slovène" lang="sl" hreflang="sl" data-title="Molska masa" data-language-autonym="Slovenščina" data-language-local-name="slovène" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Masa_molare" title="Masa molare – albanais" lang="sq" hreflang="sq" data-title="Masa molare" data-language-autonym="Shqip" data-language-local-name="albanais" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D0%B0%D1%80%D0%BD%D0%B0_%D0%BC%D0%B0%D1%81%D0%B0" title="Моларна маса – serbe" lang="sr" hreflang="sr" data-title="Моларна маса" data-language-autonym="Српски / srpski" data-language-local-name="serbe" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Molmassa" title="Molmassa – suédois" lang="sv" hreflang="sv" data-title="Molmassa" data-language-autonym="Svenska" data-language-local-name="suédois" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AE%BE%E0%AE%AF%E0%AF%8D%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%BE%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%81_%E0%AE%8E%E0%AE%9F%E0%AF%88" title="வாய்ப்பாட்டு எடை – tamoul" lang="ta" hreflang="ta" data-title="வாய்ப்பாட்டு எடை" data-language-autonym="தமிழ்" data-language-local-name="tamoul" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AE%E0%B1%8B%E0%B0%B2%E0%B0%BE%E0%B0%B0%E0%B1%8D_%E0%B0%A6%E0%B1%8D%E0%B0%B0%E0%B0%B5%E0%B1%8D%E0%B0%AF%E0%B0%B0%E0%B0%BE%E0%B0%B6%E0%B0%BF" title="మోలార్ ద్రవ్యరాశి – télougou" lang="te" hreflang="te" data-title="మోలార్ ద్రవ్యరాశి" data-language-autonym="తెలుగు" data-language-local-name="télougou" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Bigat_ng_molar" title="Bigat ng molar – tagalog" lang="tl" hreflang="tl" data-title="Bigat ng molar" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Mol_k%C3%BCtlesi" title="Mol kütlesi – turc" lang="tr" hreflang="tr" data-title="Mol kütlesi" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BB%D1%8F%D1%80%D0%BD%D0%B0_%D0%BC%D0%B0%D1%81%D0%B0" title="Молярна маса – ukrainien" lang="uk" hreflang="uk" data-title="Молярна маса" data-language-autonym="Українська" data-language-local-name="ukrainien" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%85%D9%88%D9%84%D8%B1_%DA%A9%D9%85%DB%8C%D8%AA" title="مولر کمیت – ourdou" lang="ur" hreflang="ur" data-title="مولر کمیت" data-language-autonym="اردو" data-language-local-name="ourdou" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz badge-Q70893996 mw-list-item" title=""><a href="https://uz.wikipedia.org/wiki/Molyar_massa" title="Molyar massa – ouzbek" lang="uz" hreflang="uz" data-title="Molyar massa" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="ouzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Kh%E1%BB%91i_l%C6%B0%E1%BB%A3ng_mol" title="Khối lượng mol – vietnamien" lang="vi" hreflang="vi" data-title="Khối lượng mol" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamien" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%91%A9%E5%B0%94%E8%B4%A8%E9%87%8F" title="摩尔质量 – wu" lang="wuu" hreflang="wuu" data-title="摩尔质量" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%91%A9%E5%B0%94%E8%B4%A8%E9%87%8F" title="摩尔质量 – chinois" lang="zh" hreflang="zh" data-title="摩尔质量" data-language-autonym="中文" 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src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/20px-Logo_disambig.svg.png" decoding="async" width="20" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/30px-Logo_disambig.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Logo_disambig.svg/40px-Logo_disambig.svg.png 2x" data-file-width="512" data-file-height="375" /></a></span></div><div class="bandeau-cell" style="display:table-cell;padding-right:0.5em"> <p>Pour les articles homonymes, voir <a href="/wiki/Masse_(homonymie)" class="mw-disambig" title="Masse (homonymie)">Masse (homonymie)</a>. </p> </div></div> <div class="infobox_v3 infobox infobox--frwiki noarchive"> <div class="entete" style=""> <div>Masse molaire</div> </div> <table><caption class="hidden" style="">Données clés</caption> <tbody><tr> <th scope="row"><a href="/wiki/Unit%C3%A9s_de_base_du_Syst%C3%A8me_international" title="Unités de base du Système international">Unités SI</a></th> <td> <span class="nowrap"><a href="/wiki/Kilogramme" title="Kilogramme">kg</a>⋅<a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">mol</a><sup>−1</sup></span></td> </tr> <tr> <th scope="row">Autres unités</th> <td> <a href="/wiki/Gramme" title="Gramme">gramme</a> par <a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">mole</a> (g/mol)</td> </tr> <tr> <th scope="row"><a href="/wiki/Dimension_(physique)" title="Dimension (physique)">Dimension</a></th> <td> <span class="nowrap"><a href="/wiki/Masse" title="Masse">M</a>·<a href="/wiki/Quantit%C3%A9_de_mati%C3%A8re" title="Quantité de matière">N</a><sup> −1</sup></span></td> </tr> <tr> <th scope="row">Nature</th> <td> Grandeur <a href="/wiki/Scalaire_(physique)" title="Scalaire (physique)">scalaire</a> <a href="/wiki/Grandeur_intensive" class="mw-redirect" title="Grandeur intensive">intensive</a></td> </tr> <tr> <th scope="row">Symbole usuel</th> <td> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>M</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f82cade9898ced02fdd08712e5f0c0151758a0dd" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.442ex; height:2.176ex;" alt="{\displaystyle M}"></span></td> </tr> <tr> <th scope="row">Lien à d'autres grandeurs</th> <td> <a href="/wiki/Concentration_massique" title="Concentration massique"><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \rho _{i}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>ρ</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>i</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \rho _{i}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1f9e51d2ad9cab8f8a5d962502ddf4189b713f7a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:2.002ex; height:2.176ex;" alt="{\displaystyle \rho _{i}}"></span></a> = <a href="/wiki/Concentration_molaire" title="Concentration molaire"><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle c_{i}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>c</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>i</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle c_{i}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/01acb7953ba52c2aa44264b5d0f8fd223aa178a2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.807ex; height:2.009ex;" alt="{\displaystyle c_{i}}"></span></a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M_{i}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>i</mi> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M_{i}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/eda8fd06f1cd5de22ed07385a0f8aa19773b2de9" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:3.054ex; height:2.509ex;" alt="{\displaystyle M_{i}}"></span></td> </tr> </tbody></table><p class="navbar bordered noprint" style=""><span class="plainlinks navigation-not-searchable"><a class="external text" href="https://fr.wikipedia.org/w/index.php?title=Masse_molaire&action=edit">modifier</a></span> <span typeof="mw:File"><a href="/wiki/Mod%C3%A8le:Infobox_Grandeur_physique" title="Consultez la documentation du modèle"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/12px-Info_Simple.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/18px-Info_Simple.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Info_Simple.svg/24px-Info_Simple.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></p></div> <p>La <b>masse molaire</b> d'une <a href="/wiki/Substance_chimique" title="Substance chimique">substance</a> est la masse d'une <a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">mole</a> de cette substance. Dans le <a href="/wiki/Syst%C3%A8me_international_d%27unit%C3%A9s" title="Système international d'unités">Système international d'unités</a> elle s'exprime en <a href="/wiki/Kilogramme" title="Kilogramme">kilogrammes</a> par mole (kg/mol), mais on l'exprime plus couramment en <a href="/wiki/Gramme" title="Gramme">grammes</a> par mole (g/mol, 1 <abbr class="abbr" title="gramme par mole">g/mol</abbr> = 10<sup>−3</sup> <abbr class="abbr" title="kilogramme par mole">kg/mol</abbr>) : </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M={\frac {m}{n}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>M</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>m</mi> <mi>n</mi> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M={\frac {m}{n}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/32398a386cca20dcc0e938544d13e9742e073d6c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:8.417ex; height:4.676ex;" alt="{\displaystyle M={\frac {m}{n}}}"></span></dd></dl> <p>où : </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>M</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f82cade9898ced02fdd08712e5f0c0151758a0dd" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.442ex; height:2.176ex;" alt="{\displaystyle M}"></span> est la masse molaire de la substance (kg/mol ou g/mol) ;</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle m}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>m</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle m}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0a07d98bb302f3856cbabc47b2b9016692e3f7bc" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.04ex; height:1.676ex;" alt="{\displaystyle m}"></span> est la masse d'une certaine quantité de la substance (kg ou g) ;</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle n}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>n</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle n}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a601995d55609f2d9f5e233e36fbe9ea26011b3b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.395ex; height:1.676ex;" alt="{\displaystyle n}"></span> est la <a href="/wiki/Quantit%C3%A9_de_mati%C3%A8re" title="Quantité de matière">quantité</a> considérée (mol).</li></ul> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Détermination"><span id="D.C3.A9termination"></span>Détermination</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=1" title="Modifier la section : Détermination" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=1" title="Modifier le code source de la section : Détermination"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Particules_subatomiques">Particules subatomiques</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=2" title="Modifier la section : Particules subatomiques" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=2" title="Modifier le code source de la section : Particules subatomiques"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Les masses molaires du <a href="/wiki/Proton" title="Proton">proton</a> et du <a href="/wiki/Neutron" title="Neutron">neutron</a> sont voisines de 1 <abbr class="abbr" title="gramme par mole">g/mol</abbr> : respectivement 1,007 276 5 et 1,008 664 9 <abbr class="abbr" title="gramme par mole">g/mol</abbr><sup id="cite_ref-CODATA_1-0" class="reference"><a href="#cite_note-CODATA-1"><span class="cite_crochet">[</span>1<span class="cite_crochet">]</span></a></sup>. Celle de l'électron est environ 1 800 fois plus faible : 0,000 548 6 <abbr class="abbr" title="gramme par mole">g/mol</abbr><sup id="cite_ref-CODATA_1-1" class="reference"><a href="#cite_note-CODATA-1"><span class="cite_crochet">[</span>1<span class="cite_crochet">]</span></a></sup>. </p> <div class="mw-heading mw-heading3"><h3 id="Isotopes">Isotopes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=3" title="Modifier la section : Isotopes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=3" title="Modifier le code source de la section : Isotopes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La masse molaire d'un <a href="/wiki/Isotope" title="Isotope">isotope</a> <span class="texhtml"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="vertical-align:baseline"><i>A</i></sup><br /><sub style="vertical-align:baseline"><i>Z</i></sub></span>X</span> (<span class="texhtml mvar" style="font-style:italic;">A</span> est le <a href="/wiki/Nombre_de_masse" title="Nombre de masse">nombre de masse</a> de l'isotope c'est-à-dire le nombre de ses <a href="/wiki/Nucl%C3%A9on" title="Nucléon">nucléons</a>, <span class="texhtml mvar" style="font-style:italic;">Z</span> est le <a href="/wiki/Num%C3%A9ro_atomique" title="Numéro atomique">numéro atomique</a> de l'isotope c'est-à-dire le nombre de ses <a href="/wiki/Proton" title="Proton">protons</a>, <span class="texhtml">X</span> est le <a href="/wiki/Liste_des_%C3%A9l%C3%A9ments_chimiques" title="Liste des éléments chimiques">symbole</a> de l'<a href="/wiki/%C3%89l%C3%A9ment_chimique" title="Élément chimique">élément</a> de numéro atomique <span class="texhtml mvar" style="font-style:italic;">Z</span>) est voisine de <span class="nowrap"><span class="texhtml mvar" style="font-style:italic;">A</span> g/mol</span> et dépend relativement peu de <span class="texhtml mvar" style="font-style:italic;">Z</span>. </p><p>Les masses molaires des isotopes <span class="texhtml"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="vertical-align:baseline">14</sup><br /><sub style="vertical-align:baseline">6</sub></span>C</span> et <span class="texhtml"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1em;font-size:80%;text-align:left"><sup style="vertical-align:baseline">14</sup><br /><sub style="vertical-align:baseline">7</sub></span>N</span> sont par exemple de 14,003 242 0 et 14,003 074 0 <abbr class="abbr" title="gramme par mole">g/mol</abbr>, respectivement. </p><p>La masse molaire d'un isotope est toujours inférieure à la somme des masses molaires de ses nucléons et de ses électrons, la différence correspondant à l'<a href="/wiki/Liaison_nucl%C3%A9aire#Défaut_de_masse" title="Liaison nucléaire">énergie de liaison</a> des nucléons à l'intérieur du <a href="/wiki/Noyau_atomique" title="Noyau atomique">noyau</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Éléments_chimiques"><span id=".C3.89l.C3.A9ments_chimiques"></span>Éléments chimiques</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=4" title="Modifier la section : Éléments chimiques" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=4" title="Modifier le code source de la section : Éléments chimiques"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="bandeau-container bandeau-section metadata bandeau-niveau-information"><div class="bandeau-cell bandeau-icone-css loupe">Article détaillé : <a href="/wiki/Masse_atomique" title="Masse atomique">Masse atomique</a>.</div></div> <p>La masse molaire d'un <a href="/wiki/%C3%89l%C3%A9ment_chimique" title="Élément chimique">élément chimique</a>, dite <i>masse molaire atomique</i> ou simplement <i><a href="/wiki/Masse_atomique" title="Masse atomique">masse atomique</a></i>, est la <a href="/wiki/Moyenne_pond%C3%A9r%C3%A9e" title="Moyenne pondérée">moyenne pondérée</a> des masses molaires de ses différents isotopes, pondérées par leurs proportions dans l'élément chimique tel qu'on le rencontre à la surface de la Terre. Ces proportions, dites <i>naturelles</i>, sont quasi constantes dans le temps et uniformes dans l'espace pour la plupart des éléments. Les masses atomiques sont listées dans le <a href="/wiki/Tableau_p%C3%A9riodique_des_%C3%A9l%C3%A9ments" title="Tableau périodique des éléments">tableau périodique des éléments</a>. </p><p>Exemple : l'élément <a href="/wiki/Chlore" title="Chlore">chlore</a> existe à l'état naturel avec les proportions 75,77 et 24,23 % des deux <a href="/wiki/Isotopes_du_chlore" title="Isotopes du chlore">isotopes</a> <sup>35</sup>Cl et <sup>37</sup>Cl. Les masses molaires de ces deux isotopes sont respectivement 34,97 et 36,97 <abbr class="abbr" title="gramme par mole">g/mol</abbr>. La masse molaire du chlore vaut donc : </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {75,77\times 34,97+24,23\times 36,97}{100}}=35,45}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mn>75</mn> <mo>,</mo> <mn>77</mn> <mo>×</mo> <mn>34</mn> <mo>,</mo> <mn>97</mn> <mo>+</mo> <mn>24</mn> <mo>,</mo> <mn>23</mn> <mo>×</mo> <mn>36</mn> <mo>,</mo> <mn>97</mn> </mrow> <mn>100</mn> </mfrac> </mrow> <mo>=</mo> <mn>35</mn> <mo>,</mo> <mn>45</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {75,77\times 34,97+24,23\times 36,97}{100}}=35,45}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d977b6fc89e9005ec0452f989cd554be46a149e1" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:40.875ex; height:5.343ex;" alt="{\displaystyle {\frac {75,77\times 34,97+24,23\times 36,97}{100}}=35,45}"></span> g/mol.</dd></dl> <div class="mw-heading mw-heading3"><h3 id="Corps_simples">Corps simples</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=5" title="Modifier la section : Corps simples" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=5" title="Modifier le code source de la section : Corps simples"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La masse molaire d'un corps simple est simplement le produit du nombre d'atomes dans les molécules de ce corps par la masse atomique. </p><p>Exemple : le <a href="/wiki/Dioxyg%C3%A8ne" title="Dioxygène">dioxygène</a> O<sub>2</sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub> a pour masse molaire la masse atomique de l'<a href="/wiki/Oxyg%C3%A8ne" title="Oxygène">oxygène</a> multipliée par deux, soit 31,998 8 <abbr class="abbr" title="gramme par mole">g/mol</abbr>. </p> <div class="mw-heading mw-heading3"><h3 id="Corps_composés"><span id="Corps_compos.C3.A9s"></span>Corps composés</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=6" title="Modifier la section : Corps composés" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=6" title="Modifier le code source de la section : Corps composés"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading4"><h4 id="Composés_moléculaires"><span id="Compos.C3.A9s_mol.C3.A9culaires"></span>Composés moléculaires</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=7" title="Modifier la section : Composés moléculaires" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=7" title="Modifier le code source de la section : Composés moléculaires"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La masse molaire d'un <a href="/wiki/Compos%C3%A9_mol%C3%A9culaire" class="mw-redirect" title="Composé moléculaire">composé moléculaire</a> (appelée masse molaire moléculaire) se calcule en additionnant les masses molaires de tous les éléments qui constituent ses molécules en les multipliant par les coefficients de la <a href="/wiki/Formule_brute" title="Formule brute">formule brute</a> du composé<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite_crochet">[</span>a<span class="cite_crochet">]</span></a></sup>. </p> <div style="margin:0.5em 2em;"><strong>Exemples :</strong> <div style="padding-left:2em; border-left:1px dotted #999;"> <p>On lit dans le <a href="/wiki/Tableau_p%C3%A9riodique_des_%C3%A9l%C3%A9ments" title="Tableau périodique des éléments">tableau périodique des éléments</a> : </p> <dl><dd><i>M</i><sub>H</sub> = 1,0 <abbr class="abbr" title="gramme par mole">g/mol</abbr> ;</dd> <dd><i>M</i><sub>C</sub> = 12,0 <abbr class="abbr" title="gramme par mole">g/mol</abbr> ;</dd> <dd><i>M</i><sub>O</sub> = 16,0 <abbr class="abbr" title="gramme par mole">g/mol</abbr>.</dd></dl> <p>L'<a href="/wiki/Mol%C3%A9cule_d%27eau" title="Molécule d'eau">eau</a> a pour formule brute H<sub>2</sub>O<sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>, soit : </p> <dl><dd><i>M</i><sub>eau</sub> = 2 <i>M</i><sub>H</sub> + <i>M</i><sub>O</sub> = 2 × 1,0 + 16,0 = 18,0 <abbr class="abbr" title="gramme par mole">g/mol</abbr>.</dd></dl> <p>Le <a href="/wiki/Glucose" title="Glucose">glucose</a> a pour formule brute C<sub>6</sub>H<sub>12</sub>O<sub>6</sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>, soit : </p> <dl><dd><i>M</i><sub>glucose</sub> = 6 <i>M</i><sub>C</sub> + 12 <i>M</i><sub>H</sub> + 6 <i>M</i><sub>O</sub> = 6 × 12,0 + 12 × 1,0 + 6 × 16,0 = 180,0 <abbr class="abbr" title="gramme par mole">g/mol</abbr>.</dd></dl> </div></div> <p>La masse molaire est numériquement identique à la moyenne pondérée des <a href="/wiki/Masse_mol%C3%A9culaire" title="Masse moléculaire">masses des molécules individuelles</a> exprimée en <a href="/wiki/Unit%C3%A9_atomique" class="mw-redirect" title="Unité atomique">unités atomiques</a> (u). Cette moyenne est pondérée par les abondances des espèces isotopiques; par exemple pour CCl<sub>4</sub> les espèces sont <sup>12</sup>C<sup>35</sup>Cl<sub>4</sub>, <sup>13</sup>C<sup>35</sup>Cl<sub>4</sub>, <sup>12</sup>C<sup>35</sup>Cl<sub>3</sub><sup>37</sup>Cl, etc. </p> <div class="mw-heading mw-heading4"><h4 id="Solides_ioniques">Solides ioniques</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=8" title="Modifier la section : Solides ioniques" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=8" title="Modifier le code source de la section : Solides ioniques"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Comme pour les composés moléculaires, il faut d'abord connaître la <a href="/wiki/Formule_brute" title="Formule brute">formule brute</a> du solide ionique. À nouveau, on additionne toutes les masses molaires pour tous les éléments du solide en tenant compte des proportions de chaque élément, et en ajoutant les <a href="/wiki/Mol%C3%A9cule_d%27eau" title="Molécule d'eau">molécules d'eau</a> dans le cas des solides <a href="/wiki/Hydrate" title="Hydrate">hydratés</a>. </p> <dl><dd>Exemple :</dd> <dd><a href="/wiki/Sulfate_de_cuivre" title="Sulfate de cuivre">Sulfate de cuivre(II) pentahydraté</a> CuSO<sub>4</sub>•5H<sub>2</sub>O<sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub> :</dd> <dd><i>M</i> = <i>M</i>(Cu) + <i>M</i>(S) + 4<i>M</i>(O) + 5[2<i>M</i>(H) + <i>M</i>(O)] = 63,5 + 32,1 + 4×16 + 5(2 + 16) = <span class="nowrap"><span title="">249,6</span> <span title="Gramme">g</span>·<span title="Mole">mol</span><sup>-1</sup></span>.</dd></dl> <div class="mw-heading mw-heading2"><h2 id="Notes_et_références"><span id="Notes_et_r.C3.A9f.C3.A9rences"></span>Notes et références</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=9" title="Modifier la section : Notes et références" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=9" title="Modifier le code source de la section : Notes et références"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Notes">Notes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=10" title="Modifier la section : Notes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=10" title="Modifier le code source de la section : Notes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small lower-alpha" style=""><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-2"><span class="mw-cite-backlink noprint"><a href="#cite_ref-2">↑</a> </span><span class="reference-text">De cette masse il faut théoriquement retrancher l'énergie des liaisons interatomiques divisée par le carré de la <a href="/wiki/Vitesse_de_la_lumi%C3%A8re" title="Vitesse de la lumière">vitesse de la lumière</a> (selon la formule de l’équivalence masse-énergie d'Einstein <a href="/wiki/E%3Dmc2" title="E=mc2"><span class="nowrap"><i>E = mc</i><sup>2</sup></span></a>), mais en pratique cette correction n'est pas significative parce qu'elle est beaucoup trop petite.</span> </li> </ol></div> </div> <div class="mw-heading mw-heading3"><h3 id="Références"><span id="R.C3.A9f.C3.A9rences"></span>Références</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=11" title="Modifier la section : Références" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=11" title="Modifier le code source de la section : Références"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small decimal" style=""><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-CODATA-1"><span class="mw-cite-backlink noprint">↑ <sup><a href="#cite_ref-CODATA_1-0">a</a> et <a href="#cite_ref-CODATA_1-1">b</a></sup> </span><span class="reference-text"><a href="/wiki/CODATA" class="mw-redirect" title="CODATA">CODATA</a> 2010.</span> </li> </ol></div> </div> <div class="mw-heading mw-heading2"><h2 id="Voir_aussi">Voir aussi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=12" title="Modifier la section : Voir aussi" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=12" title="Modifier le code source de la section : Voir aussi"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r194021218">.mw-parser-output .autres-projets>.titre{text-align:center;margin:0.2em 0}.mw-parser-output .autres-projets>ul{margin:0;padding:0}.mw-parser-output .autres-projets>ul>li{list-style:none;margin:0.2em 0;text-indent:0;padding-left:24px;min-height:20px;text-align:left;display:block}.mw-parser-output .autres-projets>ul>li>a{font-style:italic}@media(max-width:720px){.mw-parser-output .autres-projets{float:none}}</style><div class="autres-projets boite-grise boite-a-droite noprint js-interprojets"> <p class="titre">Sur les autres projets Wikimedia :</p> <ul class="noarchive plainlinks"> <li class="wiktionary"><a href="https://fr.wiktionary.org/wiki/masse_molaire" class="extiw" title="wikt:masse molaire">masse molaire</a>, <span class="nowrap">sur le <span class="project">Wiktionnaire</span></span></li> </ul> </div> <div class="mw-heading mw-heading3"><h3 id="Articles_connexes">Articles connexes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Masse_molaire&veaction=edit&section=13" title="Modifier la section : Articles connexes" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Masse_molaire&action=edit&section=13" title="Modifier le code source de la section : Articles connexes"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">Mole</a></li> <li><a href="/wiki/Masse_atomique" title="Masse atomique">Masse atomique</a></li> <li><a href="/wiki/Masse_mol%C3%A9culaire" title="Masse moléculaire">Masse moléculaire</a></li> <li><a href="/wiki/Poids_%C3%A9quivalent" title="Poids équivalent">Poids équivalent</a></li> <li><a href="/wiki/Volume_molaire" title="Volume molaire">Volume molaire</a></li></ul> <table class="wikitable"> <caption>Synoptique des grandeurs de masse moléculaire </caption> <tbody><tr> <th>Grandeur</th> <th>Définition</th> <th>Unité</th> <th>Remarque </th></tr> <tr> <td><a href="/wiki/Nombre_de_masse" title="Nombre de masse">Nombre de masse</a></td> <td>Le nombre de nucléons d'un atome.</td> <td>Entier sans dimension.</td> <td>La différence entre le nombre de masse et la <a href="/wiki/Masse_mol%C3%A9culaire" title="Masse moléculaire">masse moléculaire</a> de l'atome vient des inégalités dans l'énergie de <a href="/wiki/Liaison_nucl%C3%A9aire" title="Liaison nucléaire">liaison nucléaire</a>, et est typiquement inférieure au pour cent. </td></tr> <tr> <td><a href="/wiki/Masse_atomique" title="Masse atomique">Masse atomique</a></td> <td>La masse d'un atome ou d'une molécule.</td> <td>(<a href="/wiki/Kilogramme" title="Kilogramme">kilogramme</a>) <a href="/wiki/Unit%C3%A9_de_masse_atomique" class="mw-redirect" title="Unité de masse atomique">uma</a></td> <td>Exprimée en <a href="/wiki/Unit%C3%A9_de_masse_atomique" class="mw-redirect" title="Unité de masse atomique">unité de masse atomique</a>, la mesure de la masse atomique est égale à celle de la <a href="/wiki/Masse_mol%C3%A9culaire" title="Masse moléculaire">masse moléculaire</a>. </td></tr> <tr> <td><a href="/wiki/Masse_mol%C3%A9culaire" title="Masse moléculaire">Masse moléculaire</a></td> <td>Rapport entre la masse atomique d'une molécule de ce corps et l'unité de masse atomique.</td> <td>Nombre sans dimension.</td> <td>Pour un isotope donné, la masse moléculaire est peu différente de son nombre de masse. </td></tr> <tr> <td>Masse molaire</td> <td>La masse d'une mole d'une molécule (ou d'un atome).</td> <td>(kg/mol) g/mol</td> <td>Exprimée en <a href="/wiki/Gramme" title="Gramme">gramme</a> par <a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">mole</a>, la mesure de la masse molaire est égale à la <a href="/wiki/Masse_mol%C3%A9culaire" title="Masse moléculaire">masse moléculaire</a>. </td></tr> <tr> <td><a href="/wiki/Unit%C3%A9_de_masse_atomique" class="mw-redirect" title="Unité de masse atomique">Unité de masse atomique</a> (uma)</td> <td>Le douzième de la masse d'un atome de <a href="/wiki/Carbone_12" title="Carbone 12">carbone 12</a>.</td> <td>(<a href="/wiki/Kilogramme" title="Kilogramme">kilogramme</a>)</td> <td>Elle vaut 1,66 × 10<sup>−27</sup> <abbr class="abbr" title="kilogramme">kg</abbr>, sensiblement la masse d'un proton (1,672 × 10<sup>−27</sup> <abbr class="abbr" title="kilogramme">kg</abbr>) ou d'un neutron (1,675 × 10<sup>−27</sup> <abbr class="abbr" title="kilogramme">kg</abbr>), la différence correspond à l'énergie de <a href="/wiki/Liaison_nucl%C3%A9aire" title="Liaison nucléaire">liaison nucléaire</a> du carbone. </td></tr> <tr> <td><a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">Mole</a> (mol)</td> <td><a href="/wiki/Quantit%C3%A9_de_mati%C3%A8re" title="Quantité de matière">Quantité de matière</a> d'un système contenant autant d'entités élémentaires qu'il y a d'atomes dans 12 grammes de carbone 12.</td> <td><a href="/wiki/Mole_(unit%C3%A9)" title="Mole (unité)">mole</a> (mol)</td> <td>Le nombre d'entités est le <a href="/wiki/Nombre_d%27Avogadro" title="Nombre d'Avogadro">nombre d'Avogadro</a>, 6,022 × 10<sup>23</sup> <abbr class="abbr" title="par mole">mol<sup>−1</sup></abbr>. </td></tr></tbody></table> <ul 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