Oxygen makes up about 21% of the Earth's atmosphere. Nitrogen is the most abundant component, making up approximately 78%.
The percent of oxygen in dry air is approximately 21%.
Oxygen makes up about 21% of the Earth's atmosphere.
Oxygen makes up 21 percent of the air by volume.
Air typically contains about 21% oxygen by volume.
Roughly 21% of the air we breathe is oxygen. Nitrogen makes up about 78% of the air, with the remaining 1% composed of various other gases.
A small percent . exhaled air always contains oxygen .
The percent of oxygen in dry air is approximately 21%.
Oxygen makes up about 21% of the Earth's atmosphere.
Typically, the air you breathe is comprised of 18 to 21 percent Oxygen.
Oxygen makes up 21 percent of the air by volume.
oxygen
oxygen! There is 21 percent oxygen in inspired ( the stuff you breath in) air and 13 percent in expired(the stuff you breath out)
Air is 20.5 percent oxygen.
air is made of 19.98 percent oxygen 79 percent nitrogen and 2 percent carbon
The percent of oxygen is 27. this increases the natural percent of 21 by 6 percent causing living organisms to have too much oxygen.
Air typically contains about 21% oxygen by volume.
21 percent.