Xochi81997go Xochi81997go Chemistry Answered . If you have 159.0 g of CuO (copper oxide) how many grams of NH 3 (nitrogen trihydride) do you need to react with the CuO ? (Show your work for full credit, GM - MM - MG) 3 CuO + 2 NH3 1 Cu + 3 H₂O + 1 N₂