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30 September, 22:59

What is the mass of a sample of copper that contains 4.78 x 1023 atoms?

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  1. 30 September, 23:17
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    50.45679

    Explanation:

    mass of 1 mole (6.02 x 10^23atoms) of copper: 63.546g

    so,

    63.546g x 4.78 x 10^23 / 6.02 x 10^23 = 50.45679g (you could round this to the nearest decimal if u wish so)
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