What is the mass in grams of H₂ that can be formed from 55.2 grams of NH₃ in the following reaction? 2 NH₃(g) → 3 H₂(g) + N₂(g)

Answer 1

2NH₃(g) ==> 3H₂(g) + N₂(g) ... balanced equation

Using the stoichiometry of the balanced equation, the molar masses of NH3 and H2 and dimensional analysis, we can answer the question as follows:

55.2 g NH₃ x 1 mol NH₃/17 g x 3 mol H₂ / 2 mol NH₃ x 2 g H₂/mol H₂ = 9.74 g H₂