An American penny is 97.5% zinc and 2.5% copper and hasa mass of 2.5 g. Use the approximation that a penny is pure zinc, which has an atomic mass of 65.38 g/mol, to estimate the number of electrons in a penny.

Chemistry
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Chapter2: Atoms, Molecules, And Ions
Section: Chapter Questions
Problem 127CP: A single molecule has a mass of 7.31 1023 g. Provide an example of a real molecule that can have...
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An American penny is 97.5% zinc and 2.5% copper and has
a mass of 2.5 g. Use the approximation that a penny is pure zinc,
which has an atomic mass of 65.38 g/mol, to estimate the number of
electrons in a penny.

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