Flexi Says: The Haber process is a reaction in which nitrogen gas is combined with hydrogen gas to form ammonia. The balanced equation is shown below.
N2 (g)+ 3H2 (g) → 2NH3 (g)
If equals moles of each reactant are used, hydrogen will be the limiting reagent as 3 moles are hydrogen are used up for every one mole of nitrogen to form ammonia.