Question

3) Nitrogen gas can be produced by combining gaseous ammonia (NH 3 ) over solid copper (IIoxide at high temperatures. The other products of the reaction are solid copper and water vapor. If a sample containing 35.1 g of NH 3 is reacted with 85.6 g of Cuo. How many grams of will be N 2 formed?

Answer 1

3CuO + 2 NH₃ → 3Cu + N₂ + 3H₂O

$n(CuO)=\frac{m}{M}=\frac{85.6}{79.545}=1.076$

$n(NH3)=\frac{m}{M}=\frac{35.1}{17.031}=2.061$

calculations are carried out further on the limiting reagent

$\frac{1.076}{3}=\frac{x}{1}$

x=0.359 n(N₂)

$m=n\times M=0.359\times28.014=10.05$ g