[Miss1nik2]

Each of four identical tires of a car is filled with a different gas.  Gas pressure in each tire is 3.0 atm at 25oC. One tire contains neon,  another – argon, the 3rd one has krypton, and the last one has unknown gas. How many molecules are there in each tire?

Thanks for anything you can tell me!

[AWK]

For calculations you need a volume of tire. But you can safely state that in each tire is the same number of molecules.

[Borek]

http://en.wikipedia.org/wiki/Avogadro's_hypothesis