why is more  nitrogen present in air than oxygen?
952154
Their is more Nitrogen in the air than oxygen, because it is a very stable molecule (N2), it takes a lot of energy to react nitrogen gas with respect to Oxygen, oxygen is very reactive, (it is an oxidizer) so  a lot of reactions can happen  (ie. rust forming or combustion reactions) it is also good to note that because of this, that oxygen is the 2nd most abundant element in the earth's crust primarily found in mineral form (i.e. silicon dioxide = sand)
397938
!st, and most important use of nitrogen is what you are doing right now. It's mixed with the oxygen which you & I are breathing.
372603
Its got nothing to do with oxygen, that theories been scientifically disproven. But i dont have another answer, sorry
825624
Nitrogen why because,\n\nBeing an inert gas, it cannot catch fire or explode or aid combustion.\nTyres inflated with nitrogen run between 10 and 15% cooler.\nTyres inflated with air run hotter than those inflated with nitrogen. Nitrogen disperses heat quicker than air. Tyres run cooler and tyre life is extended by up to 20%. Tyres inflated with nitrogen do not lose pressure as quickly as those filled with air.\nEven Formula 1 Cars do use Tyres filled with Nitrogen
623526
Nitrogen (approx 78%)\nOxygen (approx 21%)
629297
Answer is DRY AIR!!!\n\nTo see WHY HUMID AIR IS LESS DENSE THAN DRY AIR, we need to turn to one of the laws of nature the Italian physicist Amadeo Avogadro discovered in the early 1800s, which you might recall from your high school chemistry class.\n\nIn simple terms, Avogadro found that a fixed volume of gas, say one cubic meter, at the same temperature and pressure, would always have the same number of molecules no matter what gas is in the container. Most beginning chemistry books explain how this works. \n\nImagine a cubic foot of perfectly dry air. It contains about 78% nitrogen molecules, which each have an atomic weight of 28. Another 21% of the air is oxygen, with each molecule having an atomic weight of 32. The final one percent is a mixture of other gases, which we won't worry about. \n\nMolecules are free to move in and out of our cubic foot of air. What Avogadro discovered leads us to conclude that if we added water vapor molecules to our cubic foot of air, some of the nitrogen and oxygen molecules would leave — remember, the total number of molecules in our cubic foot of air stays the same. \n\nThe water molecules that replace nitrogen or oxygen have an atomic weight of 18. They are lighter than both nitrogen and oxygen. In other words, replacing nitrogen and oxygen with water vapor decreases the weight of the air in the cubic foot; that is, it's density decreases. \n\nWait a minute, you might say, "I know water's heavier than air." \n\nTrue, liquid water is heavier, or more dense, than air. But, the water that makes the air humid isn't liquid. It's water vapor, which is a gas that is lighter than nitrogen or oxygen.\n\nCompared to the differences made by temperature and air pressure, humidity has a small effect on the air's density. But, humid air is lighter than dry air at the same temperature and pressure
872661
If nitrogen makes up 78% of the air, it will be responsible for 78% of the pressure, namely 760(0.78) = 592.8 mm Hg.
912161
Nitrogen (N2) 780,840 ppmv (78.084%) \nOxygen (O2) 209,460 ppmv (20.946%)
834600
N2O would be a good guess.
1150304
Normal air is composed of about 78% nitrogen, 21% oxygen, .93% argon, and around .03-.05% carbon dioxide, among other gases.\n\nGood luck!
407580
It depends on how it's used, but common uses of Nitrogen... It's part of a compound in fertilizers, it's used to freeze things, it's used to fill up tires, it's used in cars for more power, those are just a couple, I am sure there are thousands more that I don't know of.
70540
oxygen, nitrogen, hydrogen, methane, helium
531056
We have air in abundance it surrounds the earth , it's a mixture of Oxygen and Nitrogen etc.\nWhy do you want to make more??
14971
Primarily made up of nitrogen (78.09%) and oxygen (20.95%). The remaining 1% is made up of argon (0.93%), carbon dioxide (0.03%) and other trace gases (0.003%). Water vapor (water in its gaseous state) is also present in air in varying amounts.
1002178
Carbon dioxide acts as a greenhouse gas at all altitudes. You are correct that it is heavier than air, and therefore is less prevalent at higher altitudes.
732418
Oh I know,  I know, is it the ozone? neeee Oh I'm sorry the answer we were looking for was actually atmosphere. Sorry little johnny better luck next time on guess that ocean of air around the Earth.
414368
Those space suit the astronauts wear? THey are hooked up to and filled with not pure oxygen, like other answerers said, but the same mix of air as on earth -  78% nitrogen and 21% oxygen. This is done because pure oxygen is extremely flammable, and the astronauts of Apollo 1 died when a spark went off in their cockpit.