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elixir [45]
3 years ago
9

CLAIM:Pennies are not all copper.

Chemistry
1 answer:
Zigmanuir [339]3 years ago
5 0

Answer:

Explanation:

Mint produced more than 130 billion pennies. Then, in 1982 the Mint introduced a penny that is 97.6 percent zinc and only 2.4 percent copper with a density of 7.2 g/mL. By comparison, the old pre-1982 copper pennies were 95 percent copper and 5 percent zinc with a density of 8.8 g/mL.

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