Air Is 79% N₂ and 21% O₂ by Volume

question 105

Multiple Choice

Air is 79% N₂ and 21% O₂ by volume. Calculate the mass of oxygen in a 2.0-L bottle of air at 1.0 atm, 25°C.

• A) 0.550 g
• B) 2.36 g
• C) 1.81 g
• D) 2.62 g
• E) none of these

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Definitions:

Worldwide Percentage

A measure or portion that represents a part of a total globally, expressed as a percentage.

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