The number of moles of O2 that are needed to react with 24 moles of C2H6 is 84 moles of O2
Explanation
Step 1: write the equation for reaction
= 2C2H6 +7O2 → 4CO2 + 6H2O
Step 2: use the mole ratio to determine the moles of O2
- that is the mole ratio of C2H6 : O2 is 2:7
- therefore the moles of O2= 24 x7/2= 84 moles of O2
