chemistry question

Question

Given the following equation, which is the correct form of the conversion factor needed to convert the number of moles of O2 to the number of moles of Fe2O3 produced? 

          4Fe + 3O2 → 2Fe2O3

Answer 1

Stoichiometry shows you the relationship between moles of O₂ to Fe₂O₃ is 3 : 2

So, to convert moles of O₂ to moles of Fe₂O₃ you would do as follows:

moles O₂ x 2 moles Fe₂O₃/3 moles O₂

So, 2/3 would be the conversion factor