Question

Consider the reaction below.

2H2 + O2 ---> 2H2O

How many moles of water are produced from 13.35 mol of oxygen?
6.675 mol
26.70 mol
53.40 mol
66.75 mol

Answer 1

The moles of water that are produced from 13.35 mol of oxygen is 26.70 moles (answer B)

calculation

2H2 +O2→ 2H2O

The moles of H2O is calculated using mole ratio.

that is; from the balanced equation above the mole ratio of O2 :H2O is 1:2

therefore the moles of water=13.35 moles x 2/1 =26.70 moles

Answer 2

In the balanced reaction shown, there are twice as many moles of water as oxygen. If 13.35 moles of oxygen are reacted, 26.70 moles of water is formed.