Question #87747

1 Answer
Nick
Sep 30, 2016

#30.89 × 10^"23"# atoms

Explanation:

The fact that it is Ca is irrelevant.

One mole of a substance 1 mole contains #6.022140857 × 10^"23"# atoms, ions or molecules. This is Avogadro's number and is defined as the number of atoms in 12 g of carbon-12.

Som 5.13 moles of Ca would contain:

#5.13 × 6.022140857 × 10^"23" = 30.89 × 10^"23"# atoms.

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