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12 May, 15:18

How many moles of Cu in 7.81 * 10^21 atoms of Cu

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  1. 12 May, 16:50
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    Use avogadro's number---> 6.02 x 10^23 atoms = 1 mol

    7.81 x 10^21 (1 mole / 6.02 x 10^23) = 0.0130 moles of Cu
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