Question

. When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find the number of moles of oxygen that are needed to form 6 mol of Fe2O3. and please show work so I can understand how you got it.

Answer 1

4Fe + 3O2 -> 2 Fe2O3.

As we know oxygen is O2, we need to get the number of oxygen atoms on the product side to be an even number. The easiest way is to multiply by two, which gives 6 oxygen atoms on the product side. To balance on the starting material you then use 3 molar equivalents of O2. There are 4 Fe atoms on the product side, so then multiply Fe by 4 on the starting material side.

There is a 3/2 ratio of O2 to product, therefore mutliply 6 mols by 3/2 (1.5), which gives you 9 mols.

Answer 2

Thank you!

Answer 3

glad to help!