Americans combined drive about 4.0 *10⁹ miles per day and their vehicles get an average of 20 miles per gallon of fuel used. For each 1 kg of gasoline that is burned, about 3.0 kg of carbon dioxide are produced. How many kilograms of CO₂ are emitted into the atmosphere each day by cars in the U.S.? One gallon of gas weighs about 3.5 kg. A)2.1 * 10⁹ kg B)8.4 * 10¹¹ kg C)1.7 * 10⁸ kg D)93 kg E)none of these

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Quizplus · Accepted Answer

4.0 * 10^9 miles / day * (1 gallon / 20 miles) * (3.5 kg / gallon) * (3 kg CO2 / 1 kg gasoline) = 2.1 * 10^9 kg CO2 / day

Americans Combined Drive About 4