Using the following balanced equation, how many moles of water is needed for form 23.4 grams of oxygen? 2 H2O → 2 H2 + O2

Answer 1

Hello, Tolani,

2 H₂O → 2 H₂ + O₂

The balanced equation says we need 2 moles of H₂O for every 1 mole of O₂. So let's find how many moles are in 23.4 grams of O₂ by dividing by it's molar mass of 32 grams/mole.

There are 0.731 moles of O₂.

Multiply that by 2 to determine the moles of H₂O required. which is 1.46 moles.

1.46 moles H₂O to make 23.4 grams of O₂.

Bob