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The Earth's Atmosphere Is Composed (By Volume)of 78

Question 77

Multiple Choice

The Earth's atmosphere is composed (by volume) of 78.08% nitrogen (N2) ,20.95% oxygen (O2) ,0.93% argon (Ar) ,0.25% water vapor (H2O) ,and traces of other gases,most importantly,carbon dioxide (CO2) .The CO2 content of the atmosphere is currently around 0.039%.The average mass of a mole of the atmosphere is 28.96 g and the molar mass of carbon dioxide is 44 g.What is the total mass of CO2 in the Earth's atmosphere?


A) 2.05·1015 kg
B) 3.11·1015 kg
C) 4.86·1015 kg
D) 7.97·1018 kg
E) 5.25·1018 kg

Correct Answer:

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