Question

How many molecules are in 4.5 moles of Ca(OH),?​

Answer 1

61 molecules will be the answer most definitely :)

Answer 2

We will use dimensional analysis to solve this.

We will need to know Avogadro's number, which is 6.02 × 10²³.

4.5 mol ×
`(6.02 * 10^(23) molecules)/(1 mol)` = 2.71 × 10²⁴ molecules.

There are 2.71 × 10²⁴ molecules in 4.5 moles of Ca(OH).