Question

There are 2.56 x 108 cars in the US. If each car is driven 12,000 miles/year, and averages 20 miles/gallon (octane, C8H18, density = 0.780 g/mL), how many tons of CO2 are produced per year?
C8H18 (l) + 25 O2(g) → 16 CO2(g) + 18 H2O(g)

Answer 1

This assumes the average gasoline vehicle on the road today has a fuel economy of about 20 miles per gallon and drives around 12,000 miles per year. Every gallon of gasoline burned creates about 8,887 grams of CO₂.