Use the balanced equation, 2H2 + O2 - 2H2O, to answer the following questions.

Question

Part: 0 / 3

Part 1 of 3

Determine the limiting reactant. Select the single best answer.

1.25 mol H2

1.00 mol O2

Answer 1

To determine the limiting reactant, we can compare the moles of each reactant to see which one will run out first.

Using the balanced equation, we see that 2 moles of H2 reacts with 1 mole of O2.

For 1.25 mol of H2, we would need 1.25/2 = 0.625 mol of O2 to react completely.

Since we have 1.00 mol of O2, which is more than the 0.625 mol needed, O2 is in excess and H2 is the limiting reactant.

Therefore, the limiting reactant is 1.25 mol H2.