alleryWhich gas is the most abundant in dry air?
AOxygen
BNitrogen
CArgon
DNeon
Answer & Solution
Correct answer: B. Nitrogen
1. Dry air is measured by the share of its molecules.
2. Nitrogen makes up about 78 percent of dry air.
3. Oxygen is next at about 21 percent, and argon and carbon dioxide are only small fractions.
_Source: Wikipedia, Atmosphere of Earth, Lead section_
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