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By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?

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By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?
A. `2.8`
B. 4
C. `1.4`
D. `2.0`
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Correct Answer - C
`"Average velocity"=sqrt((8RT)/(piM))`
`therefore" "V_(av) propsqrtT" or "((V_(av))_(2))/((V_(av))_(1))=sqrt((2T)/(T))=1.4`
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