Chemistry
Elements and Compounds
Atoms and Atomic Structure

How many atoms are present in 3.14g of Cu?

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April 25, 2009 10:59PM

For this problem, the atomic mass is required. Take the mass in grams and divide it by the atomic mass. Then multiply it by Avogadro's constant, 6.02 × 1023.

3.14 grams Cu / (63.5 grams) × (6.02 × 1023 atoms) = 2.98 × 1022 atoms