Question

Iron (III) oxide can be reduced with $CO$ to form metallic iron as described by unbalanced chemical reaction.
$F{e}_2{O}_3+CO\to Fe+C{O}_2$
The number of moles of $CO$ required to form one mole of $Fe$ from its oxide is:

• A. 1
• B. 1.5
• C. 2
• D. 3

Answer 1

Answer: (B)

1.5

The balanced chemical equation is

$2{Fe}_2{O}_3+6CO⟶4Fe+6{CO}_2$

$6$ moles of $CO$ is required to form $4$ moles of $Fe$.

$\therefore$ For $1$ mole of $Fe=\frac{6}{4}=1.5$ moles of $CO$ are required.