Question

.Calculate the number of molecules of sulphur (S8) present in 128 g of solid sulphur. (Atomic

mass S = 32 u).​

Answer 1

Answer:

Gram Atomic mass of Sulphur = 32g Molar mass of sulphur (S8) = 8 × 32g = 256g ∴ 256g of sulphur (S8) = 6.023 × 1023 molecules 128gof sulphur (S8) = 6.023 × 1023 × 128/ 256 = 5 × 1022 molecules