Final answer:
For each formula unit of iron (IV) oxide that reacts, typically one molecule of carbon dioxide is produced, which corresponds to option (a) 1.
Step-by-step explanation:
The student has asked how many molecules of carbon dioxide are produced when a formula unit of iron (IV) oxide reacts. In order to answer this, we need to look at the balanced chemical equation of the reaction. The chemical formula for iron (IV) oxide is FeO2, and when it reacts, it generally forms Fe and CO2. However, since we are not provided a specific reaction, we cannot give a definitive answer. Most commonly, iron oxides react with carbon in a blast furnace to produce iron and carbon dioxide, where the general formula could be as follows:
FeO2 + C → Fe + CO2
Based on this general and simplified equation, for each formula unit of iron (IV) oxide, there would be one molecule of carbon dioxide produced. Therefore, for this question, the answer would be one molecule of carbon dioxide, making the correct choice (a) 1.