Since Air Is a Mixture, It Does Not Have a "Molar

question 92

Multiple Choice

Since air is a mixture, it does not have a "molar mass." However, for calculation purposes, it is possible to speak of its "effective molar mass." (An effective molar mass is a weighted average of the molar masses of a mixture's components.) If air at STP has a density of 1.285 g/L, its effective molar mass is g/mol.

• A) 34.4
• B) 30.0
• C) 26.9
• D) 28.8
• E) 31.4

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