By volume, which of the following are the most abundant gases in the Earth's atmosphere?
A)nitrogen and oxygen
B)carbon dioxide and nitrogen
C)oxygen and water vapour
D)oxygen and helium

Question

Quizplus · Accepted Answer

Nitrogen and oxygen are the most abundant gases in the Earth's atmosphere, comprising 78% and 21% of the atmosphere by volume, respectively. Carbon dioxide and water vapor are also present in the atmosphere but in much smaller amounts, while helium is only present in trace amounts.

By Volume, Which of the Following Are the Most Abundant