posted by Sam .
Consider the following: CH4, SiH3Cl, Ar, and CH2F2.
(a) Which one will diffuse the fastest?
(b) What is the rms speed (m/s) of the slowest-moving atom or molecule at 25°C?
The fastest diffuser is the loest molar mass substance.
urms = sqrt(3RT/M)
M is molar mass. R is 8.314. T in kelvin.