0
Oxygen comprises about 21% of fresh air. Room air is nearly always refreshed from outsides sources sufficiently fast for this value to hold true. However, if ventilation is extremely poor it can differ.
Wiki User
∙ 7y ago
Wiki User
∙ 11y agoPercentage is percentage and weight is weight.
Of the air that fills a room, about 20% is Oxygen, about 75% is Nitrogen, about 4% is Carbon Dioxide and small proportions of other gasses.
Wiki User
∙ 14y agoOur atmosphere is made up of 78% Nitrogen, 21% O2 Or Oxygen, and 1% other gases.
Wiki User
∙ 13y agoAccoding to atmospherical balance 21% of oxygen is available in atmosphere.
Wiki User
∙ 15y agoNormally Oxygen comprises 20% of the air.
Wiki User
∙ 12y agoTwenty percent of it is air is oxygen
Wiki User
∙ 15y ago20.95% of the air we breath is Oxygen.
Wiki User
∙ 12y ago21 percent
Wiki User
∙ 11y ago20.95%
Add your answer:
Earn +20 pts
What is the percentage of oxygen in earths air?
21% of the air is oxygen
What does an oxygen meter measure?
An oxygen meter measures the percentage of oxygen in the air being tested.
What percentage of air is made of nitrogen and oxygen together?
== ==
What is oxygens percentage?
Air is 21 percent oxygen.
How does the Amazon rainforest produce oxygen in the air?
The amazon produces 20 % of the world's oxygen. But deforestation is bringing that percentage down drastically.
What is the percentage of oxygen in earths air?
21% of the air is oxygen
What the oxygen percentade composition in air?
oxygen percentage in air is 20%
What is the maximum oxygen percentage at air?
Room air is about 21% oxygen.
What percentage of the air around is pure oxygen?
Air contains about 19-20% oxygen
What is the percentage of pure air composed of oxygen?
21%oxygen
What percentage of oxygen can be found in air?
78% Nitrogen 20.5% Oxygen .5% Argon 1% Others for small calculations we take percentage of oxygen in air as 21%
What percentage of air you axhale is oxygen?
About 18%
What percentage of inhaled air is oxygen?
About 21%.
Percentage of oxygen in inhaled air?
About 21%
What percentage of the air you breathe oxygen?
about 21%
What percentage of oxygen do you breath from the air?
100%. All of the oxygen that I breathe comes from the air! The answer that you were probably after, but did not ask, was about the percentage of oxygen in the air that we breathe. The questions may sound similar but they are not the same. The answer is a little over 20%.
What percentage or fraction of air is pure oxygen What comprises the most of the rest?
21% of air is pure oxygen
