Question

How many moles are in `5.75 * 10^24` atoms of Al?

Answer 1

9.55 mol of Al

Explanation:

To obtain the number of moles of a certain element given the number of atoms only, you have to divide it with Avogadro's number, `6.02 * 10^23 mol^(-1)`.

`mol Al = (5.75 * 10^24 Al` atoms`) * (( 1 mol) / (6.02 * 10^(23) Al`atoms`)`
`mol Al = 9.55 mol`