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a modern penny weighs 2.7150 g but contains only 0.0600 g of copper (cu). how many copper atoms are present in a modern penny?
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a modern penny weighs 2.7150 g but contains only 0.0600 g of copper (cu). how many copper atoms are present in a modern penny?

User Joshua Howard
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5.83 x 10^20 Cu atoms

User MGK
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