## Chemistry 9th Edition

In the Haber process, the rate of production of ammonia is $\frac{2}{3}$ the rate of consumption of hydrogen.
The Haber process is $N_2+2H_2\rightarrow 2NH_3$. Therefore, for every $2\space mol$ of $NH_3$ produced, $3\space mol$ of $H_2$ is consumed, and the rate of production of ammonia is $\frac{2}{3}$ the rate of consumption of hydrogen.