A chemistry student was asked to calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron(III) oxide. His calculation is shown below: 1.20

1.6 moles of iron

Explanation:

-Metals reacts with oxygen to form oxides.

-The chemical reaction between oxygen and iron is written as below:

-pu notice from the balanced chemiocal equation above that the mole ration of iron to oxygen is 4:3

-We equate and cross multiply to find moles of iron in the reaction;

Hence, 1.6 moles of iron reacts with 1.2 moles of oxygen in the above reaction.