Question

4Fe + 3O2 → 2Fe2O3, if 8 moles of iron and excess oxygen from the air were available, how many moles of iron (III) oxide would be produced?

Answer 1

it's as simple as this:

\(\sf \dfrac{moles~of~Fe}{Fe's~coefficient}=\dfrac{moles~of~Fe_2O_3}{Fe_2O_3's~coefficient}\)