Nitrogen and hydrogen can react to form ammonia. n2(g)+3h2(g)→2nh3(g) part a choose ratios showing the relationships between moles of each of the reactants and products in the reaction. choose ratios showing the relationships between moles of each of the reactants and products in the reaction. 1 mol n2 : 3 mol h2 : 2 mol nh3 2 mol n2 : 2 mol h2 : 3 mol nh3 1 mol n2 : 1 mol h2 : 1 mol nh3 1 mol n2 : 1/3 mol h2 : 1/2 mol nh3