Balance the following redox reaction:Fe2O3 + CO → Fe + CO2

The balanced equation needs 3CO molecules. Count atoms: 2 iron, 3 oxygen on left. Must equal 2 iron, 3 oxygen (in CO₂) on right.

Other equations don’t balance oxygen atoms. Iron oxide has 3 oxygen atoms. You need 3 CO molecules to match.

Remember: Balance one element at a time. Check your work by counting atoms on both sides.