How do you balance the nitrogen gas in the ecosystem?

Nitrogen gas is not an ideal gas. It is a good choice for the study of ideal gas behavior due to it's Boyle temperature, the temperature at which a non-ideal gas exhibits ideal behavior, being near...

Can react to form ammonia NH3. They do react only under specific conditions.

From the air around us, since air is composed of 78.08% nitrogen. Nitrogen gas is an industrial gas produced by the fractional distillation of liquid air, or by mechanical means using gaseous air...

in its most common form; yes.

Nitrogen is an Inert gas, but can be found in other states of matter.