A combustion reaction between octane (C8H18) and oxygen produces carbon dioxide and water. If 3.98 mol of octane are burned in a complete combustion, how many moles of carbon dioxide are produced?

Answer 1

Write the correctly balanced equation for the reaction taking place:

2C₈H₁₈ + 25O₂ ==> 16CO₂ + 18H₂O .. balanced equation

Use the stoichiometry of the balanced equation to find moles of CO₂ produced:

3.98 mols C₈H₁₈ x 16 mols CO₂ / 2 mols C₈H₁₈ = 31.8 moles CO₂