Homework Help: Chemistry

Posted by Sam on Friday, November 30, 2012 at 11:47pm.

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?

Chemistry - DrBob222, Saturday, December 1, 2012 at 12:02am
a)
The fastest diffuser is the loest molar mass substance.

b)
urms = sqrt(3RT/M)
M is molar mass. R is 8.314. T in kelvin.

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