A sample of iron has a mass of 1.68 g. Calculate (a) the number of moles of iron present, (6) the number of atoms of iron in the sample

Explanation

To solve the problem step by step, we will calculate the number of moles of iron in the sample and then the number of atoms of iron present in that sample.

### Step 1: Calculate the number of moles of iron

1. **Identify the mass of iron**: The mass of the iron sample is given as 1.68 g.
2. **Find the atomic weight of iron (Fe)**: The atomic weight of iron is approximately 56 g/mol.
3. **Use the formula for moles**: The number of moles (n) can be calculated using the formula:
\[
...