Question

How many molecules of Ca are found in a sample with 0.2 mols?

Answer 1

`\boxed{1.2 * 10^(23)\text{ atoms}}`

Step-by-step explanation:

6.023 × 10²³ atoms of Ca are in 1 mol of Ca

`\text{No. of atoms} = \text{0.2 mol} * \frac{6.023 * 10^(23)\text{atoms }}{\text{1 mol }} = \mathbf{1.2 * 10^(23)} \textbf{ atoms}}\\\\\text{There are }\boxed{\mathbf{1.2 * 10^(23)} \textbf{ atoms}} \text{ atoms in 0.20 mol of Ca}`