The oxygen content of dry air in the atmosphere
A)is about 78.1%.
B)is about 21.0%.
C)is about 0.03%.
D)varies depending on the altitude.
E)is inversely proportional to the partial pressure of oxygen.

Question

Quizplus · Accepted Answer

The oxygen content in dry air is about 21.0%. This is the second highest component after nitrogen, which makes up about 78.1%. The remaining fraction is made up of other gases such as argon, carbon dioxide, neon, helium, and others. While the oxygen content can vary slightly depending on altitude and location, the overall composition of dry air remains relatively consistent.

The Oxygen Content of Dry Air in the Atmosphere