Chemistry Past Questions and Answers

The density of a certain gas is 1.98gdm^-3 at s.t.p. What is the molecular mas of the gas?

When pure aluminium metal is heated to red hot in the presence of nitrogen gas, the compound formed is

When pure aluminium metal is heated to red hot in the presence of nitrogen gas, the compound formed is

A dense white fume is formed when ammonia gas reacts with

N_2(g) + 3H_2(g) ↔ 2NH_3(g) ΔH = -90 kJ
In the equation above, the yield of ammonia can be decreased by