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

User Stephen Last
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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
User Bronts
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