Finding Vrms given pressure, density and Temperature

[sckeen1988]

Homework Statement

At 273K and .01 atm, the density of a gas is 1.24*10^-5 g/cm^3. Find the Vrms for the gas molecules.

Homework Equations

Vrms=sqrt(3RT/M) Density=m/V

The Attempt at a Solution

I tried to relate the density given to the molar mass or the number of moles somehow, but failed completely.

 

[diazona]

Use the ideal gas law (assuming it is an ideal gas).

 

[sckeen1988]

How can I get volume from that?

 

[turin]

Hint: does the answer really depend on the volume? E.g., if you find the solution for 1 cubic meter of this gas, will you find a different solution for, say, 2 cubic meters, if all of the other given properties are the same?

 

[sckeen1988]

Thanks a lot for your help.

 

[gpgp]

pls enlighten me on how you re-solve this. I don't understand on ohw do you use ideal gas law to resolve this.