the balanced equation for the formation of ammonia is as follows;
N₂ + 3H₂ ---> 2NH₃
stoichiometry is the molar ratio of components in a reaction.
Stoichiometry could be determined using the coefficients of the compounds in balanced reactions.
coefficient of N₂ - 1
coefficient of H₂ - 3
molar ratio of N₂ to H₂ is 1:3
(2) 1:3