Step 1
Write your reaction and balanced it
2H2 + O2 => 2H2O
Step 2
Find please the moles of O2 that reacts
1 mole O2 ----- 2 moles H2O
X ----- 13.5 moles
X = 6.75 moles O2
Answer: 6.75 moles O2
4.6m questions
6.0m answers