Physics help, Regarding Ideal gas?

Question

Any help would be greatly appreciated!
If a certain sample of an ideal gas has a temperature of 104 degrees C and exerts a pressure of 2.3 x 10^4 Pa on the walls of it's container, how many gas molecules are present in each cm^3 of volume? assume that the gas is ideal. The gas constant is R=8.314 J/mol K and avagadro's number is NA=6.022 x 10^23 molecules/mol.

Answer 1

PV = nRT

Ideal gas law, that's it, solve for "n". Just make sure you keep track of units and that the temperature is in absolute units.

This is more chemistry than physics, by the way.

Answer 2

Start with pV = n RT where n = number of moles. You know p, R, and T and you really want Na*n/V - that will give you molecules/volume.

So. n/V = p/(RT) multiply both sides by Na

Na*n/V = p*Na/(RT)

Let Na*n/V = N = numbre of molecules/ m^3. Then to get moelcules/cm^3, multiply by 10^-6

N (molecule/cm^3) = 10^-6 (m/cm^3) p*Na/(RT)

plug in the numbers and remember to convert C to Kelvin by adding 273.