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Question

mol

mol

mol

mol

mol

mol

Be sure to answer all parts.

Suppose you want to convert iron ore to a specific amount of pure iron using the following reaction:
Fe3O4(s) + 4CO(g) 3Fe(s) + 4CO2(g)
(a) What mole ratio would you use in the following equation to determine the number of moles of CO needed to react with a known amount of Fe3O4?
mol CO = mol Fe3O4 ×

mol

mol

(b) If you add more than enough CO so that all the Fe3O4 reacts, what mole ratio would you use in the following equation to determine the moles of CO2 produced?
mol CO2 = mol Fe3O4 ×

mol

mol

(c) Suppose you know the number of moles of Fe product formed and you want to know the number of moles of CO that reacted. What mole ratio would you use in the following equation?
mol CO = mol Fe ×

mol

mol

Explanation / Answer

Fe3O4(s) + 4CO(g) 3Fe(s) + 4CO2(g)

1.Mole ratio of Fe3O4 and CO is 1:4

mol CO = 1/4 mol Fe3O4

2. Since the moles of Fe3O4 are less, so it is a limiting reagent here. Amount of product depends on the limiting reagent

Mole ratio of Fe3O4 and CO2 is 1:4

mol Co2= 1/4 mol Fe3O4

3. Mole ratio of CO and Fe is 4:3

mol CO= 4/3 mol Fe

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