Question

Calculate the number of sulphur atoms in 64g of sulphur​

Answer 1

The molar mass for sulphur is 32g/mol, therefore the number of moles is 64g ÷ 32 g/mol = 2 mol. 1 mol = 6.02 × 10^23, so there are 2 × 6.02 × 10^23 = 1.204 × 10^24 atoms.