Ammonia is formed from the reactants nitrogen and hydrogen in presence of a catalyst under suitable conditions. Assuming all volumes are measured in litres at s.t.p. Calculate the volume of ammonia formed if only 10% conversion has taken place.

100 cc. each of water gas and oxygen are ignited and the resultant mixture of gases cooled to room temp. Calculate the composition of the resultant mixture. [Water gas contains CO and H₂ in equal ratio]

Calculate the volume occupied by 53.5 g of Cl₂. [Cl = 35.5]

Calculate the number of molecules in 109.5 g of HCl. [H = 1, Cl = 35.5]