(xiii) Which of the following would occupy 22.4 litres at S.T.P.?
1. 32g of oxygen gas
2. 2 moles of hydrogen gas
3. 6.022 x 10²³ molecules of ammonia
(a) 1 & 2
(b) 1 & 3
(c) 2 & 3
(d) 1, 2 & 3
[Atomic weights: O =16, H=1, N = 14]

Solution