The Earth's Atmosphere Is Composed Nitrogen (N₂),oxygen (O₂),argon (Ar),water Vapor

question 19

Multiple Choice

The Earth's atmosphere is composed nitrogen (N₂) ,oxygen (O₂) ,argon (Ar) ,water vapor (H₂O) ,and traces of other gases.There are 6.74·10¹⁶ kg of argon in earth's atmosphere.The average mass of a mole of the atmosphere is 28.96 g and the molar mass of argon is 40 g.What is the percentage,by volume of argon in the Earth's atmosphere?

• A)0.79%
• B)0.53%
• C)0.88%
• D)1.02%
• E)0.93%

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