Question

Calculate the number of atoms in $3.2$ g of sulphur?

Answer 1

Weight of 1 mol sulphur = molar mass of sulphur

$32g=1$ mol

$3.2g=0.1$ mol

1 mol has $6.022\times {10}^{23}$atoms

0.1 mol will have $6.022\times {10}^{22}$ atoms