WAEC - Chemistry (2012 - No. 26)
Which of the following gases has the lowest rate of diffusion under the same condition? [H = 1.00; He = 4. 00; O = 16.0; CI = 35.5]
CI2
H2
He
O2
Selitys
According to Graham's law of diffusion and effusion,
r \(\propto\) \(\sqrt{\frac{1}{M}}\).
Therefore, the more the molar mass, the less the rate of diffusion and effusion.