Question

The equation is 2 H2O2 --> 2H2O + O2. If you have 5.6 moles of H2O, how many moles of O2 can you make?

a) 2.8 mol
b) 3.6 mol
c) 5.6 mol
d) 11.2 mol

Answer 1

To determine how many moles of O2 can be made from 5.6 moles of H2O, one must utilize the stoichiometry of the given chemical equation. The balanced equation indicates a stoichiometric ratio of 2 moles of H2O per 1 mole of O2. Therefore, 5.6 moles of H2O will produce 2.8 moles of O2.

Step-by-step explanation:

The question asks us to determine the number of moles of the gas Oxygen (O₂) that can be produced from 5.6 moles of water (H₂O) using the decomposition reaction of hydrogen peroxide (H₂O₂). In accordance with the balanced chemical equation 2 H₂O₂ → 2 H₂O + O₂, it is clear that 2 moles of H₂O are produced for every 1 mole of O₂ released during the reaction. Therefore, for every 2 moles of H₂O formed, 1 mole of O₂ is produced.

Using this stoichiometric relationship, we can specify that if 2 moles of H₂O correspond to 1 mole of O₂, then 5.6 moles of H₂O would equal half of that quantity in moles of O₂, which is 2.8 moles of O₂. Hence, the correct answer to the question is (a) 2.8 mol of O₂ can be made from 5.6 moles of H₂O.