1. The problem statement, all variables and given/known data When gaseous ammonia is passed over solid copper (II) oxide at high temperatures, nitrogen gas is formed. 2NH3 + 3CuO → N2 + 3Cu + 3 H2O What is the limiting reagent when 34 grams of ammonia form 26 grams of nitrogen in a reaction that runs to completion? 2. Relevant equations 3. The attempt at a solution Using stoichiometry to find the solution in terms of N2, I get: 34 g NH3 x 1 mol NH3/17 g NH3 x 1 mol N2/2 mol NH3 = 1 mol N2 Then, 3 mol Cuo x 1 mol N2/3 mol CuO = 1 mol N2 What am I doing wrong? I have tried this problem 7 times.