How to solve the question in the description?

Question

How many moles of nitrogen gas would be produced if 5.36 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction? 2 NH₃(g) + 3 CuO (s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)

Answer 1

2 NH₃(g) + 3 CuO (s) ==> 3 Cu(s) + N₂(g) + 3 H₂O(g) .. balanced equation

Since there is an excess NH₃, we need only concern ourselves with CuO to determine how much N₂ will form.

We will use the stoichiometry of the balanced equation and dimensional analysis to solve the problem:

5.36 mol CuO x 1 mol N₂ / 3 mol CuO = 1.79 mols N₂