Iron(III) oxide (159.7 g mol¹) reacts with carbon monoxide (28.01 g mol¹) to produce iron (55.85 g mol¹) and carbon
dioxide (44.01 g mol−1).
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Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)
What mass of CO must react to produce 100.0 g of Fe?

150.0 g
66.7 g
75.2 g