Question

32. (Bonus) Americans combined drive about 4.0 x 109 kilometers a day and get an average of 20 miles per gallon of gasoline. For each kilogram of gasoline that is burned about 3 kg of carbon dioxide (CO2) are produced. With the density of gasoline as 0.93 g/cm3, how many kg of CO2 are emitted by U.S.cars into the atmosphere each minute? (1 gallon 3.7854 L, 1 mile 1.609 km) 4.7 x 109 kg CO2/min 5.47 x 107 kg CO2/min 4.38 x 106 kg CO2/min 9.12 x 105 kg CO2/min

Answer 1

Option 4th is correct.

Gwer distance travelled = 4x10 km 1 day 1.609 km = 1 mile 4x10km = 4x109 km x 1 mile - 2.486Xco miley 1.609 km 20 miles per galloon of gasoline per day. 2:486x109 mile - 2.486x109 milex! = 1.243 x10 gallons 20 mile I gallons – 3,7854 L T• 243 x108 gallons — 3.7854 x10243 X10% - 4,71x108 4/dy Now density = mass of gasoline = 0.93 kg x 4.71x108 1 __ -4-38 x 103 kg 1 kg gasoline produces 3 kg CO2 so 4.38 x 108 kg gasoline produced = 3x4-38 x100kg foto = 13.14x10% kg/day - I day = 60824 minute kg of coz burned per minute = 13-14X108 kg/min 60x24 29.125 X10S kg /min as density = 0.33gm/cm3 = 0.93 gm x 10 kg 0.9 kg/L 1034 free Scanned CamScanner

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