Americans drive about 4.0 x 10^9 miles per day, and their cars get an average of 20 miles per gallon of gas used. For each kilogram of gasoline used, about 3 kg of carbon dioxide is produced. How many kilograms of CO2 are emitted into the atmosphere by cars in the US each day? [1 gal = 3.5 kg]
No of gallons of gasoline used =4x10^9/20
=2x10^8
=2x10^8x3.5 Kg
=7x10^8 Kg
1 Kg gasoline produces 3 Kg CO2
So 7x10^8 Kg gasoline produces (7x10^8)(3)
=21x10^8 Kg CO2
=2.1x10^9 Kg
20 miles covered per gallon of gas
So, for 4.0 x 10^9 miles, 4/20 x 10^9 gallon of gas = 0.2 x 10^9 gallon of gas
1 gallon= 3.5kg
So, 0.2 x 10^9 gallon = 3.5 x 0.2 x 10^9 kg = 0.7 x 10^9 kg gas
1kg of gasoline, 3kg CO2
So for 0.7 x 10^9 kg gas, we get 0.7 x 10^9 x 3kg CO2 = 2.1x 10^9 kg gas
each kilogram of gasoline used, about 3 kg of carbon dioxide is produced
total gallons of gas = 4.0 X 10^9 / 20 = 2.0 X 10^8 gallons
mass of gas = 2.0 X 10^8 X 3.5 = 7.0 X 10^8 kg
so mass of CO2 = 7.0 X 10^8 X 3 = 2.1 X 10^9 kg
Americans drive about 4.0 x 10^9 miles per day, and their cars get an average of...
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