In the balanced equation, N2 + 3H2 = 2NH3, If 4.0 moles of H2 react, how many moles of NH3 can be produced?

Answer 1

N₂ + 3 H₂ → 2 NH₃

From the balanced chemical reaction, 3 moles of H₂ reacts to form 2 moles of NH₃. Thus, if you start with 4.0 moles of H₂,

4.0 mol H₂ x (2 mol NH₃ / 3 mol H₂) = 2.7 mol NH₃ produced