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Based on the balanced reaction 4 Fe + 3 O2 → 2 Fe2O3, a student starts...

Based on the balanced reaction 4 Fe + 3 O2 → 2 Fe2O3, a student starts this reaction with these amounts of chemicals: 12 mol Fe, 15 mol O2, and 0 mol Fe2O3.

What chemical is the limiting reactant?

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Answer #1

From the balanced equation we can say that

4 mole of Fe requires 3 mole of O2 so

12 mole of Fe will require

= 12 mole of Fe *(3 mole of O2 / 4 mole of Fe)

= 9 mole of O2

But we have 15 mole of O2 which is in excess so O2 is an excess reactant and Fe is limiting reactant

Therefore, the limiting reactant is: Fe

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