chemical equations

Question

Carbon dioxide is a green house gas that is linked to global warming. It is released into the atmosphere through the combustion of octane (C₈H₁₈) in gasoline. Write the balanced chemical equation for the combustion of octane. (Use the lowest possible whole number coefficients. Omit states-of-matter from your answer.)

Calculate the mass of octane needed to release 4.70 mol CO₂.

Answer 1

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

4.72 mol CO₂ x 2 mol C₈H₁₈ / 16 mol CO₂ x 114 g/mol = 67.3 g