The mole fraction of Oxygen = 21/100= .21
Oxygen makes up about 21% or approximately 1/5 of the air.
21% of air is pure oxygen
Air containing a substantial fraction of oxygen. If there is not enough oxygen we die.
Oxygen is in the air.
oxygen have air and that how air can be improtant to the oxygen around us .
all of it that I can get
Oxygen is very important for humans.Man cannot survive without oxygen.It is the primary agent in almost all process that takes place in a human body.When we inhale air we only utilise the oxygen present in the air.But really the air we inhale is a mixture of many gasses.The air we inhale contains about 78% nitrogen ,21% oxygen. When air is inhaled, a portion of that 21% that is oxygen diffuses across the alveolar membrane into the blood to be taken to the body to be used. At the same time, carbon dioxide, a waste gas for the body, is diffusing back across the alveolar membrane to be exhaled. This results in the change in inhaled and exhaled air. Exhaled air has a lower fraction of oxygen and a higher fraction of carbon dioxide as a result of the diffusion across the alveolar membrane.
the mole fraction of oxygen= 37/100 0.37 the mole fraction of Nitrogen= .63 that equals to give 1
21% of the air is oxygen.