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A US 1 cent piece prior to 1982 was made of copper and had a mass of about 3.1g. This is about 0.049 moles of copper, or around 2.9 x 1022 atoms.

More recent pennies are mostly zinc (97.5%) and have a mass of about 2.5g. This works out to around 2.2 x 1022 zinc atoms and 5.9 x 1020 copper atoms, so overall around 2.3 x 1022 atoms.

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9y ago
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Wiki User

13y ago

A penny weighs 2.5 grams and is 2.5% copper. Therefore, there is

2.5 grams × .025 = .0625 grams of copper in a penny

Then you convert grams to atoms with the molecular weight of copper and Avogadro's constant

.0625 grams ÷ 63.5 grams/mol × (6.02 × 1023 atoms) ÷ 12 in one dozen = 4.94 × 1019 dozens of copper atoms

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Wiki User

12y ago

3.0 x 10^22 / 500

= 6 x 10^19 reams

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Wiki User

8y ago

short answer: 22long answer: 2.04 X 10^22 atoms of copper

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Wiki User

7y ago

This depends on the mass of this penny.

Number of atoms = [(Mass of the coin) x 6,022.10e23]/63,546.

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Wiki User

15y ago

20,000,000,000,000,000,000,000

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Wiki User

12y ago

8.97 x 10^22

Tim in Seaton

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Wiki User

8y ago

The answer is 11,425.10e+23 atoms.

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Wiki User

11y ago

7

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OJB GaMiNg

Lvl 2
3y ago

Alot innit

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Q: How many dozens of copper atoms in a penny?
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