How many moles of NH3 can be produced from 24.0 mol of H2 and excess N2

First, let's construct the reaction of the reactants to produce the product. The reactants are hydrogen gas, H₂, and nitrogen gas, N₂. They will produce ammonia, NH₃. The complete balanced reaction is:

N₂ + 3 H₂ → 2 NH₃

Using the stoichiometric coefficients:

24 mol H₂ * 2 mol NH₃/3 mol H₂ = 16 moles NH₃ produced