Yes, unless it's always taken in and being excreted
Oxygen is the most abundant element in Earth's crust.
In the atmosphere, dry air contains 78.09% nitrogen and 20.95% oxygen by volume. Thus the ratio of nitrogen to oxygen is about 3.7:1.
it has more mass
0.667
Lack of oxygen to the brain makes you dizzy. High altitude generally has lower density air, which gives you less oxygen in a given volume of breath than you would get with the same volume at a lower altitude.
oxygen is used ... volume decreases.
due to an increase in the stroke volume and also the increase in blood volume. it has to keep up with the required levels of oxygen, vital after long term exersice.
Gas is compressible. As long as you can keep increasing the pressure, you can stuff as much oxygen into a bottle or a tank as you want to, until it bursts.
if this is math and your asking what gas has a percent by volume 78.09 it is nitrogen
About 20% of the volume of the air in the room is oxygen.
Oxygen
Divide 225ml by 20.9, then multiply by 100.
The volume is 64,8 L.
Whales keep air, and thus oxygen, in their lungs, not in their bellies
The function of residual volume is to keep enough pressure in the lungs to keep them from collapsing.
Earth's atmosphere is about 21% oxygen by volume (for dry air).
It contains the volume of oxygen needed to supply the victim with rescue breaths of 100% oxygen.