Question

Mole-mass problem:

Water decomposes to produce hydrogen gas and oxygen gas. How many moles of oxygen would be produced from 10.0 moles
water? 2 H2O → 2 H2 + O2

Answer 1

5.00 mol O₂

Step-by-step explanation:

• 2H₂O → 2H₂ + O₂

In order to solve this problem we will need to convert moles of water to moles of oxygen. We will do that using the stoichiometric coefficients, as follows:

• 10.0 mol H₂O *
  `(1molO_2)/(2molH_2O)` = 5.00 mol O₂

Thus 5.00 moles of oxygen would be produced from 10.0 moles of water.