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            <Attribute name="description">L&#39;équation de réaction, équilibrée, nous donne les rapports numériques entre le nombre de moles des différentes substances de la réaction. En utilisant ces rapports (appelés rapports stoechiométriques) et les masses molaires, on détermine les quantités de réactifs et de produits impliqués dans la réaction.</Attribute>
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            <video:title>Application : Calcul de masses de réactifs et de produits</video:title>
            <video:description>L&#39;équation de réaction, équilibrée, nous donne les rapports numériques entre le nombre de moles des différentes substances de la réaction. En utilisant ces rapports (appelés rapports stoechiométriques) et les masses molaires, on détermine les quantités de réactifs et de produits impliqués dans la réaction.</video:description>
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