Oxygen gas and water are produced by the decomposition of hydrogen peroxide (h2o2). If 10.0 mol of h2o2 decomposes, what volume of oxygen will be produced?

Answer 1

2H₂O₂ ==> O₂ + 2H₂O ... balanced equation for decomposition of H₂O₂

moles O₂ produced from 10.0 mole H₂O₂:

10.0 mol H₂O₂ x 1 mol O2 / 2 mol H₂O₂ = 5.00 moles O₂

The volume of O₂ is dependent on the temperature and pressure. Assuming STP, we have...

5.00 moles O₂ x 22.4 L/mol = 112 L