A. 11% Oxygen approximately
B. 21% Oxygen approximately
C. 31% Oxygen approximately
D. None of these
Explanation:
Earth’s atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases.
A. 11% Oxygen approximately
B. 21% Oxygen approximately
C. 31% Oxygen approximately
D. None of these
Explanation:
Earth’s atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases.