Finding moles from volume? diatomic

[latitude]

Homework Statement

I'm just going to preface this by saying I know zilch about chemistry, I'm not even sure how I passed it the last time I took it, which was in grade eleven.

Is it possible for me to find moles of a gas with this information:
volume: 100 m^3 of air
The gas is a diatomic ideal gas
We are NOT at STP. The temp is 300 K.

Homework Equations

n = N/V

The Attempt at a Solution

I'm think diatomic means two... atoms... in a molecule? :P and i know
n = N/V, where N is the number of molecules. But I don't know the number of molecules. I'm not even sure this is possible, I've attempted to look it up on the net but most things seem to assume STP.
I apologize for this silly question. :(

 

[Borek]

Volume and temperature are not enough, you need pressure as well and you have to use ideal gas equation. Whether gas is diatomic doesn't matter at this moment.