2007-05-25 03:34:33 · 7 answers · asked by Dex S 1 in Science & Mathematics ➔ Other - Science
The average composition of the atmosphere is approximately 78% nitrogen (N2) and 21% oxygen (O2). The other 1% consists mainly of argon and carbon dioxide with very small amounts of other gases such as methane, nitrous oxide and CFCs.
2007-05-25 03:42:54 · answer #1 · answered by waltonblue 3 · 0⤊ 0⤋
The air we breathe contains almost 21% oxygen.
2007-05-25 10:45:26 · answer #2 · answered by Val 4 · 0⤊ 0⤋
The air we breathe is roughly 19% oxygen. Most of the air is compuse of Nitrogen, then oxygen, followed by carbon and some other Elements.
2007-05-25 10:43:31 · answer #3 · answered by MICHAEL E 1 · 0⤊ 0⤋
The air we breath is very stable
Oxygen is precise at 20.9%
nitrogen is 78%
the so called green house gas is 1.1 %
2007-05-25 16:00:56 · answer #4 · answered by JOHNNIE B 7 · 0⤊ 0⤋
about 20% of oxygen is found in air
2007-05-25 20:50:00 · answer #5 · answered by Dr. Eddie 6 · 0⤊ 0⤋
Only about 20%. 79% is nitrogen, and the other 1% is a bunch of other gases.
2007-05-25 10:42:09 · answer #6 · answered by Anonymous · 1⤊ 0⤋
19.5-21% is what people need to breathe. Any lower and you should use supplied air from a tank.
2007-05-25 10:51:02 · answer #7 · answered by hpfgirl 2 · 0⤊ 0⤋