What percentage of the air you breathe is comprised of oxygen?

Answer 1

The amount of oxygen in 100 ml of whole blood is not a set amount, but rather is dependent on many factors. Those factors include the individual's personal "volume of health," the level of activity at any one moment in time and also the environment in which the individual is located. If you were to monitor the O2 content of your blood throughout the day, you would find that the concentration was dynamic and would change in response to your activities and environment. That concentration which may be normal at one level of activity may be abnormal for another - similarly, that O2 level that may be normal at one location may be abnormal at another location. As an example, the oxygen content is a function of the partial pressure of O2 in the air. At sea level, the normal partial pressure value for O2 is about 159 mm Hg. However, if one were to be in, say, Mexico City, the value for O2 is about 122 mm Hg. Therefore, all things being equal, there is an higher O2 content as sea level than in Mexico City. A dynamic equilibrium is established in the blood known as the oxygen-haemoglobin dissociation curve. This curve related the partial pressure of oxygen in the blood with the percent of saturation of oxygen. Looking at a disassociation curve will provide you with an O2 concentration for a particular % saturation.

Answer 2

The air which you inhale is about 21% oxygen by volume. So if you take 100 cm3 (ml) of air, 21% of the air would be oxygen. See: http://chemistry.about.com/od/chemistryfaqs/f/aircomposition.htm

Answer 3

The normal hemoglobin count in males is 13 - 18 gm/dL while females it is 12 - 16 gm/dL. This count is relative of the percentage and in normal conditions a healthy individual will have 97% of hemoglobin in his/her blood.

Answer 4

if all is working properly 5 oxygen molecules will attach to each red blood cell and the oxygen stauration reading should be between 95-100%.

Answer 5

Air is comprised of 21 percent oxygen.

Answer 6

The answer is 43%