1. The problem statement, all variables and given/known data 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. 2. Relevant equations Vrms=sqrt(3RT/M) Density=m/V 3. 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.