Dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.
yes
yes
gas
rock
Pluto has no atmosphere
The percent of oxygen is 27. this increases the natural percent of 21 by 6 percent causing living organisms to have too much oxygen.
The percent of oxygen in dry air is approximately 21%.
The mass percent of oxygen is approximately 21% in Earth's atmosphere.
42 percent oxygen intake is not dangerous.
40 percent
Oxygen
21% of the atmosphere is oxygen.