Question

If a penny was made out of pure copper what would be its mass?

Answer 1

For pennies dated 1982, when both copper and zinc cents were made, and best way to determine their composition is to weigh them. Solid copper pennies weigh 3.11 grams (+/- 0.130 g.), whereas the copper plated zinc pennies weigh only 2.5 grams (+/- 0.100 g.