Question

how many moles of Fe2O2 would be formed by the action of Oxygen one kilogram of iron?

Answer 1

Here is a link that will give you a worked example of a stoichiometry problem. Just follow the steps. I suggest you look at your problem and the post; I suspect you want Fe2O3 and not Fe2O2.
http://www.jiskha.com/science/chemistry/stoichiometry.html