- #1

tigerlili

- 62

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## Homework Statement

At 318 K and 1.04 x 10-2 atm, the density of a gas is 1.75 x 10-5 g/cm3. (a) Find vrms for the gas molecules. (b) Find the molar mass of the gas.

## Homework Equations

vrms= sqrt (3RT/M)

pV=nRT

pM=dRT

pV=(m/M)RT

## The Attempt at a Solution

the main problem i am having here is units, and i am getting really frustrated, because i am a chem major, and this is chemistry!

in order to solve for the root mean square speed, i said, based on the above relationships, RT/M = p/d

so i plugged into vrms= sqrt (3p/d) BUT i don't know what units the density and pressure should be into yield m/s for the final speed- i have no idea to even apply unit analysis here

thanks!