# When 5 mol of sodium is heated with 10.4 mol of oxygen gas, how much oxygen will remain? Answer is units of mol.?

### 3 Answers

Relevance

- Bobby_ThinLv 78 months ago
4 Na + O2 = 2 Na2O

1 mol of Na reacts with 1/4 mol of O2

5 mol of Na reacts with 5/4 mol of O2 or 1.25 mol

O2 remaining = 10.4 mol - 1.25 mol = 9.15 mol O2

- Anonymous8 months ago
Assuming the product is Na2O, moles of O2 remaining = 14 - 5/2

- Roger the MoleLv 78 months ago
4 Na + O2 → 2 Na2O

(5 mol Na) x (1 mol O2 / 4 mol Na) = 1.25 mol O2 reacted

(10.4 mol initially) - (1.25 mol reacted) = 9.15 mol O2 remaining

Still have questions? Get your answers by asking now.