Homework Answers
vrms = sqrt (3*R*T/M)
here : T is temperature in Kelvin
M is molar mass
Since T is same for all, the one with lower molar mass will have
higher speed
Lets list out molar mass of all given compounds
Molar mass of H2 = 2.016
Molar mass of CH4 = 16.042
Molar mass of Cl2 = 70.9
Increasing order of molar mass is:
H2
CH4
Cl2
Same is the order of decreasing vrms
From fastest to slowest
H2
CH4
Cl2
Answer: H2 > CH4 > Cl2
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