## Chemistry: The Central Science (13th Edition)

4 moles of $CO$ can be obtained. 12 moles of $H_2$ can be obtained.
The diagrams shows the following reaction. $2CH_4+2H_2O\rightarrow 2CO+6H_2$ The ratio of $CH_4$ input to $CO$ output is $2:2$, so the mole ratio is $4:4$. Four moles of $CO$ can be obtained. The ratio of $CH_4$ input to $H_2$ output is $2:6$, so the mole ration is $4:12$. Twelve moles of $H_2$ can be obtained.