Which of the following equations is correctly balanced for the reaction between solid iron(III) oxide and carbon monoxide gas to produce solid iron and carbon dioxide gas?
Show the answer and explanation
Correct answer
A. Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)
Principle or equation
Balancing chemical equations: atoms of each element must be equal on both sides.
Why this answer is correct
Fe2O3 has 2 Fe and 3 O. With 3 CO, we get 3 O from CO, total 6 O on left, producing 3 CO2 (6 O) and 2 Fe. Each side: Fe:2, C:3, O:6.
Example
Fe2O3 + 3CO → 2Fe + 3CO2 is the standard blast furnace reaction.
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