# Problem: When FeCl3 is ignited in an atmosphere of pure oxygen, this reaction takes place.4FeCl3(s) + 3O2(g) → 2Fe2O3(s) + 6Cl2(g)If 3.00 mol of FeCl3 are ignited in the presence of 2.00 mol of O 2 gas, how much of which reagent is present in excess and therefore remains unreacted?a) 0.33 mol FeCl3 remains unreactedb) 0.67 mol FeCl3 remains unreactedc) 0.25 mol O2 remains unreactedd) 0.50 mol O2 remains unreacted

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When FeCl3 is ignited in an atmosphere of pure oxygen, this reaction takes place.

4FeCl3(s) + 3O2(g) → 2Fe2O3(s) + 6Cl2(g)

If 3.00 mol of FeCl3 are ignited in the presence of 2.00 mol of O 2 gas, how much of which reagent is present in excess and therefore remains unreacted?

a) 0.33 mol FeCl3 remains unreacted

b) 0.67 mol FeClremains unreacted

c) 0.25 mol Oremains unreacted

d) 0.50 mol O2 remains unreacted

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Limiting Reagent concept. If you need more Limiting Reagent practice, you can also practice Limiting Reagent practice problems.

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