The reaction of Fe2O3 and CO produces CO2 and Fe. Fe2O3 is the chemical formula for iron (III) oxide, CO is the chemical formula for carbon monoxide, CO2 is the chemical formula for carbon dioxide and Fe is the chemical symbol for iron.
The balanced equation for the reaction of iron (III) oxide and carbon monoxide is written as Fe2O3 + 3 CO = 3 CO2 + 2 Fe. The numbers in front of each group of chemicals indicates the number of each ion or molecule needed to balance the equation. The numbers within each chemical indicates the number of atoms of each element present.