[SheffieldWednesday4ever]

Hey, now that I converted from Biology to Chemistry, I'm in Physical Chem and was wondering about Avagadro's Principle

It sates that the equal volumers of gases at the same T & P will have the same # of moles. But couldn't we state that, if it is a closed system, no matter what we do to it, it will have the same # of moles?

[Schrödinger]

You're missing the point.

The law states that the equal volumes of gases at the same T & P will have the same number of moles.

We're not dealing with one gas alone.

i.e, Consider N₂ and O₂ having same P,V,T. The no. of moles of N₂=O₂. That is the significance

[mbeychok]

SheffieldWednesday:

You will find it most interesting to read this article in the Citizendium online encyclopedia:

    Click here ==> Avogadro's law