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The atomic mass of bromine is 79.904 u. If a chemist finds that the mass of a sample of bromine gas, Br2, is 79.904 g,-  ?

-how many moles of Br2 are present?

A 0.50000 mol  B 1.0000 mol  C 1.5000 mol  D 79.904 mol

2 Answers

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  • 2 months ago
    Favorite Answer

    A, 0.5 mol. Since the formula for finding moles is mass divided by molar mass, we first find the molar mass by doing 79.904u x 2 as Br2 has 2 molecules. we get 159.808. We then do 79.904g/159.808 to get 0.5 mol

  • 2 months ago

    A 0.50000 mol

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