Question

Calculate the number of molecule of sulphur ( S₈ ) present in 16g of solid sulphur. ?

Answer 1

Explanation:

We have to find the number of molecules present in 16g of solid sulphur

Solution :-

➜ The molecular mass of the sulphur molecule is 32 × 8 = 256 u.

➜ 1 mole of sulphur molecules is equal to 256 grams.

➜ This means 256 g of solid sulphur contains = 6.022 x 10²³ molecules.

➜ Then, 16 g of solid sulphur contains =6.022 x 10²³ / 256 = 16 molecules

= 3.76375 x 10²² molecules

Therefore, 16 g of S8 contains 3.76 x 10²² molecules