Question

The first step in a long process that converts iron ore into pure iron involves converting

iron ore into iron oxide. This step is accomplished through the following chemical
reaction:
4FeS₂ (s) + 110₂ (g) → 2Fe₂O, (s) + 8SO₂ (g)
iron oxide
iron ore
If an iron manufacturer starts with 2,512.0 moles of iron ore, how many moles of oxygen will be needed to react completely with the iron ore? How many moles of Iron Oxide will be made?

Answer 1

From the balanced chemical equation, we can see that 1 mole of iron ore reacts with 110/4 = 27.5 moles of oxygen and produces 2 moles of iron oxide.

Therefore, to react completely with 2,512.0 moles of iron ore, we need 2,512.0 x 27.5 = 69,080 moles of oxygen.

And the number of moles of iron oxide produced will be (2/4) x 2,512.0 = 1,256.0 moles.