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## Homework Statement

"At 273 K and 1.00x10^-2 atm, the density of a gas is 1.24x10^-5 g/cm^3.

A.) Find the Vrms for the gas molecules

B.) Find the molar mass and identify the gas (Choose from H2, He, H20, N2, O2, or CO2)"

## Homework Equations

Vrms = √(3RT/Mm)

pV = nRT

## The Attempt at a Solution

n = mass/Mm

pV = mass/Mm *RT

Mm = mass*RT/(pV)

Mm = ρRT/p

Vrms = √(3RT/(ρRT/p)) = √(3p/ρ)

So I have the solution up until this point, the main thing I am worried about is the units of my answer. I have pressure in atm, which is some form of Force/Area. I have density in g/cm^3. So pressure/density will be some form of (distance/time)^2, which of course is taken care of with the radical. The only thing I can not come up with is what exact units it will be in. Any help here would be greatly appreciated. Thanks in advance.