Question

2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2O

Answer 1

Answer: 0.5 moles of $N_2$ are produced in the reaction

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of $CuO$ = 113.6 g

Molar mass of $CuO$ = 79.5 g/mol

Plugging values in equation 1:

$\text{Moles of CuO}=\frac{113.6g}{79.5g/mol}=1.43 mol$

For the given chemical reaction:

$2NH_3+3CuO\rightarrow 3Cu+N_2+3H_2O$

By the stoichiometry of the reaction:

If 3 moles of $CuO$ produces 1 mole of $N_2$

So, 1.43 moles of $CuO$ will produce = $\frac{1}{3}\times 1.43=0.476=0.5mol$ of $N_2$

Hence, 0.5 moles of $N_2$ are produced in the reaction