Interpret Coefficients as Mole Ratios Practice Test

Ammonia forms according to $$\text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3.$$ What is the mole ratio of $\text{NH}_3$ to $\text{H}_2$?

For the synthesis of ammonia, the balanced equation is $$\mathrm{N_2 + 3H_2 \rightarrow 2NH_3}$$. According to the coefficients, how many moles of $\mathrm{H_2}$ react per 1 mole of $\mathrm{N_2}$?