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mathildeetelvis
@mathildeetelvis
February 2021
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bonjour, j'aurais besoin d'aide svp !!!!!! sachant qu'un atome d'or a une masse de 4×10‐²²g, calculer le nombre d'atomes d'or contenus dans une pépite de 20g. commenter le résultat. merci d'avance
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