Chemistry balancing equations

Question

Ammonia (NH3) is widely used as a fertilizer and in many household cleaners. How much ammonia is produced when 7.71 mol of hydrogen gas react with an excess of nitrogen gas? Answer in units of mol.

Answer 1

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

moles of ammonia (NH₃) produced = 7.71 moles H₂ x 2 moles NH₃/3 moles H₂ = 5.14 moles NH₃(g)