How many moles of dihydrogen gas are completely consumed in order to reduce exactly of magnetic iron — Hydrogen Chemistry Question
Question
How many moles of dihydrogen gas are completely consumed in order to reduce exactly $1\text{ mole}$ of magnetic iron oxide ($Fe_3O_4$) to metallic iron?
Answer: 4
💡 Solution & Explanation
The balanced chemical equation for the reduction is $Fe_3O_4 + 4H_2 \rightarrow 3Fe + 4H_2O$. Thus, $4\text{ moles}$ of $H_2$ are required for every $1\text{ mole}$ of $Fe_3O_4$.
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