1. Understand the Stoichiometry

The balanced chemical equation tells us:

* 2 moles of H₂O₂ react to produce 2 moles of H₂O and 1 mole of O₂.

2. Calculate Moles of Products

Since the ratio of H₂O₂ to H₂O is 2:2 (or 1:1), if you start with 4 moles of H₂O₂, you will end up with 4 moles of H₂O.

3. Calculate Moles of Oxygen

The ratio of H₂O₂ to O₂ is 2:1. Therefore, you will end up with 2 moles of O₂.

In summary:

* You will end up with 4 moles of H₂O and 2 moles of O₂.