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25 April, 20:45

If a sample of copper is 3.3g, how many moles of copper atoms is there in the sample?

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  1. 25 April, 21:34
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    3.1 * 10^22 atoms Cu

    Explanation:

    M (Cu) = 63.5 g/mol

    3.3 g Cu * 1mol Cu/63.5 g Cu = 0.0520 mol Cu

    0.0520 mol Cu * 6.02*10^23 atoms Cu/1 mol Cu = 3.1 * 10^22 atoms Cu
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