2006-10-27 18:57:52 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Something like 21% oxygen, 79% nitrogen
addendum:
To be exact found this chart:
nitrogen 78.08 %
oxygen 20.95 %
argon .934 %
carbon dioxide .0314 %
neon .00182 %
helium .000524 %
methane .00015 %
hydrogen .00005 %
carbon monoxide .00001 %
ozone .000002 %
nitrogendioxide .0000001 %
sulfur dioxide .00000002 %
2006-10-27 19:01:41 · answer #1 · answered by Anonymous · 1⤊ 0⤋
They are ice crystals, called 'contrails'. When the air is cold, moist, and stable, all it needs to form visible ice crystals are condensation nucleii. The microscopic soot particles in the exhaust serve as these condensation nucleii. The engine mixes the exhaust with the air and the cold, microscopic water droplets instantly freeze to the exhaust forming a crystal that grows. We used to think that the engine's cooling effect or the moisture added by the combustion process was part of the process. This turned out to be incorrect. The moisture is already in the air. The air is already cold enough to freeze. It just needs something to start the process of growing a crystal. The conditions must be right for this to happen, so you don't always see it. If the air is very stable, the ice crystals can remain for some time.
2016-03-19 00:48:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Atmospheric fresh air contains roughly 78% nitrogen and 21% oxygen and 0.93% argon, trace amounts of other gases, and water vapor.♥
2006-10-27 19:08:04 · answer #3 · answered by ♥ lani s 7 · 1⤊ 0⤋
Hmm... I'm pretty sure it's around 70% Nitrogen and 30% Oxygen with trace amounts of other gases.
2006-10-27 19:00:56 · answer #4 · answered by bioraptor7 2 · 0⤊ 1⤋
Composition of dry air, by volume--
(ppmv: parts per million by volume)
Gas Volume =
Nitrogen (N2)................780,840 ppmv (78.084%)
Oxygen (O2).................209,460 ppmv (20.946%)
Argon (Ar).....................9,340 ppmv (0.9340%)
Carbon dioxide (CO2)..381 ppmv
Neon (Ne).....................18.18 ppmv
Helium (He)...................5.24 ppmv
Methane (CH4)..............1.745 ppmv
Krypton (Kr)...................1.14 ppmv
Hydrogen (H2)...............0.55 ppmv
Not included in above dry air:
Water vapor (H2O)..........typically 1% to 4% (highly variable)
Minor components of air not listed above include:
Gas Volume =
nitrous oxide............0.5 ppmv
xenon.......................0.09 ppmv
ozone ......................0.02 to 0.07 ppmv
nitrogen dioxide .......0.02 ppmv
iodine....................... 0.01 ppmv
carbon monoxide ....trace
ammonia .................trace
The mean molar mass of air is 28.97 g/mol.
2006-10-29 22:48:21 · answer #5 · answered by SP!DEY ! 2 · 0⤊ 0⤋
85%oxygen and 15% other gases.
2006-10-27 19:04:05 · answer #6 · answered by Nikhil 1 · 0⤊ 2⤋
by plants
2006-10-27 23:26:40 · answer #7 · answered by neeraj_lfc 1 · 0⤊ 0⤋
"Fartless"
2006-10-27 19:01:00 · answer #8 · answered by Anonymous · 0⤊ 0⤋