What is the mass of—
(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
(c) 10 moles of sodium sulphite `(Na_(2)SO_(3))`?

Answer

(a) 14 g
(b) 108 g
(c ) 1260 g

Explanation

(a) The mass of 1 mole of nitrogen atoms is 14g.
(b) The mass of 4 moles of aluminium atoms is (4 × 27)g = 108g
(c) The mass of 10 moles of sodium sulphite `(Na_(2)SO_(3))` is
10 × [2 × 23 + 32 + 3 × 16]g = 10 × 126g = 1260g