Chapter 3, Problem 66E

Iron oxide ores, commonly a mixture of FeOand ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ ,are given the general formula ${\text{Fe}}_{\text{3}}{\text{O}}_{\text{4}}$ . They yield elementaliron when heated to a very high temperature witheither carbon monoxide or elemental hydrogen. Balancethe following equations for these processes:
$\begin{array}{l}{\text{Fe}}_{\text{3}}{\text{O}}_{\text{4}}\left(\text{s}\right){\text{+H}}_{\text{2}}\left(\text{g}\right)\to \text{Fe}\left(\text{s}\right){\text{+H}}_{\text{2}}\text{O}\left(\text{g}\right)\\ {\text{Fe}}_{\text{3}}{\text{O}}_{\text{4}}\left(\text{s}\right){\text{+CO}}_{\text{2}}\left(\text{g}\right)\to \text{Fe}\left(\text{s}\right){\text{+CO}}_2\left(\text{g}\right)\end{array}$