De broglie wavelength for helium and distance between atoms

[wang jia le]

Homework Statement

Consider a balloon filled with helium gas at room temperature (T = 294 K) and atmospheric pressure. Calculate (a) the average de Broglie wavelength of the helium atoms and (b) the average distance between atoms under these conditions. The average kinetic energy of an atom is equal to (3/2)kT, where k is the Boltzmann constant. (c) Can the atoms be treated as particles under these conditions?

Homework Equations

PV=NRT

mv=h/λ

v=sqrt(2KE/m)[/B]

The Attempt at a Solution

no idea where to start [/B]

 

[BvU]

Hello,

Well, you could start with expanding on your relevant equations: what are the variables/constants that feature in them, how do they relate to the given information in the problem statement. See if you are still missing something, etc. Elementary problem solving steps.