Which of the following is the most abundant gas in the air?
A) oxygen (O₂)
B) nitrogen (N₂)
C) water vapor (H₂O)
D) carbon dioxide (CO₂)
E) hydrogen (H₂)

Question

Quizplus · Accepted Answer

Nitrogen makes up approximately 78% of the Earth's atmosphere, making it the most abundant gas in the air. Oxygen comprises about 21%, and the remaining 1% is made up of various trace gases including carbon dioxide, water vapor, and hydrogen.

Which of the Following Is the Most Abundant Gas in the Air