(a) If an automobile travels 225 mi with a gas mileage of 20.5 mi/gal, how many kilograms of CO2 are produced? Assume that the gasoline is composed of octane, C8H18(l), whose density is 0.69 g/mL.
(b) Repeat the calculation for a truck that has a gas mileage of 5 mi/gal.