1. The problem statement, all variables and given/known data In general, which of the following gases would you expect to behave the most ideally? a) N_2 b) CO c) H_2 2. Relevant equations N/A 3. The attempt at a solution Okay, so I know that CO would definitely not behave the most ideally. I tried looking this up on the internet and I read that He would act the most ideally because it is the smallest molecule, and seeing how hydrogen is the next smallest, I think the answer is c) hydrogen gas but then I saw on another site that they said that nitrogen gas was the most ideal...so I am slightly confused. Anybody can shed some light please? Any help is appreciated.