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Le brome naturel a pour masse molaire 79.909 g/mol. Il contient essentiellement...

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Le brome naturel a pour masse molaire 79.909 g/mol. Il

contient essentiellement les isotopes 79 et 81. On considèrera que la masse

molaire approchée d’un nucléon est de 1 g/mol. Déterminer les abondances

isotopiques naturelles

x79

et

x81 de l’élément brome.

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4 pts, 5 minutes)

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