Calcium has an atomic mass of 40 g. Determine how many number of moles are present in 16 grams of calcium.

One mole of any substance contains a mass of that whole compound. However, in this case, calcium has an atomic mass of 40g. The moles present in 16 g of calcium can be found by using the below formula,

$No of moles in 16 g =\frac{Given mass}{Total mass}$

$No of moles in 16 g= \frac{16}{40}$

The molecular weight of 16 g calcium is 0.4.