Ozone occurs in upper layers. It finds suitable conditions to sustain there.
Density of oxygen is 1.429 (g/cm3)
As the altitude increases, the density of oxygen decreases.
why is the temperature and the pressure important when giving the density of oxygen and nitrogen
Yes, it is true because the density of oxygen is higher than the density of nitrogen.
Yes, every substance has density.
i don't it's value but it definitely has it's own density since its volume is directly propotional to its volume.
Oxygen exists if you are on planet earth in any space that has air. The same amount of oxygen exists in a room with a closed door as in a room with an open door.
mass divided by volume is density
Helium is lighter (less dense) than oxygen & nitrogen.
Atherosclerosis occurs when LDL (Low Density Lipoproteins) get oxidized. Since the plasma in the arteries contains plenty of oxygen to oxidize the LDL's it occurs mostly in arteries. In the veins, there is little oxygen to be found, so it is much more likely to happen in the arteries for that reason.
The reduction of oxygen that forms water occurs during respiration. It occurs when oxygen and hydrogen mix to form what is called metabolic water.
Oxygen