If you have a nitrogen filled tire that is low you can put in regular compressed air to fill it up, but you will lose some of the benefit of the nitrogen. You should replace the green cap with a black one if you have filled the tire with regular air. 90% of cars on the road are just using regular compressed air, and not having a lot of problems. So I wouldn't worry too much about it.
nitrous oxide? <><><><> Air you are breathing right this second is a mix of nitrogen (79%) and oxygen (21%)
air
When you mix oxygen, sulfur, and nitrogen, you are likely to get a mixture of gases that may include nitrogen dioxide (NO2), sulfur dioxide (SO2), and potentially other nitrogen and sulfur compounds depending on the specific conditions of the experiment. These gases can have various chemical properties and potential environmental implications.
The air that you breathe is 79.8% nitrogen. By using 100% nitrogen you exclude oxygen from inside your tire. Less oxygen, less corrosion of the tire and rim. In short it makes no difference if you have nitogen or air. Its just a marketing scam to charge you an extra $8.00 per tire for something that makes no difference in tire performance.
BOOM.
If you are using a regular pump that draws its air from the surrounding atmosphere, then yes you will be pumping oxygen(as well as a mix of other gases) into the tire. Oxygen is corrosive and flammable, and pumping pure O2 into your tires is a terrible idea. Plain air is about 75% nitrogen, which is fairly inert, and this is the preferred gas for pumping tires, as it is also the cheapest.
An average air mix of mostly oxygen and nitrogen.
Air is mainly a mix of oxygen and nitrogen. Oxygen is the part your body uses- the good stuff.
Oxygen mixes with air because air is primarily composed of nitrogen, oxygen, and other gases like carbon dioxide and argon. These gases naturally mix together due to diffusion, which is the movement of molecules from an area of higher concentration to an area of lower concentration. Oxygen and nitrogen will mix together in the atmosphere until they reach an equilibrium.
A mixture is obtained; 80 % N and 20 % O is air.
78% of the air we breathe is nitrogen. 21% is oxygen, and the other 1% is a mix of other gasses.
Not a good idea. That is an extremely explosive mix.