Given the equation N2+ 3 H2-> 2 NH3 ; How many grams of ammonia can be made from 44g of H2?

Answer 1

Stoichiometry and dimensional analysis:

N₂ + 3H₂ ==> 2NH₃ ... balanced equation

g H₂ x mol H₂ / g H₂ x mol NH₃ / mol H₂ x g NH₃ / mol NH₃ = g NH₃ ... dimensional analysis

44g H₂ x 1 mol H₂/2 g x 2 mol NH₃ /3 mol H₂ x 17 g NH₃ /mol NH₃ = 249 g NH₃ = 250 g NH₃ (2 sig.figs.)