Questions
What is the rms speed of helium gas molecules at STP?
a
2.6 X 103 m/s
b
1.3 x103m/s
c
1.3 x102m/s
d
2.6 x 102m/s
detailed solution
Correct option is B
Vrms is given is,Vrms =3RTMwAt S.T.P ., T= 273 K, Mw=4g/mol=0.004kg/mol; R=8.31J/mol kVrms =3 x8.31 x2730.004=1.7 x106= 1.3 x 103m/sTalk to our academic expert!
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