# Root mean square speed

i asked to find the root mean square speed of Methane in temperature of 50 degrees Celsius.

so i have an dilemma which formula i need to use, so in the picture you can see the 2 formula that i have doubts.

thanks.

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1 i guess
what is the 2nd one for

well 2 is T= temperature and M=Molar mass.
i also think is 1 but i wasen't sure.

by the way what R mean in the 1 formula ?

thank you.

its universal Gas constant

equation 1 is correct if T = temperature (in kelvins), R = the gas constant, and M= the molar mass.

I cannot see how formula 2 is meaningful. it certainly does not have the units of velocity.

ok i think i will try to keep on from here thanks to both of you. :)

ok this what i got can you just tell me if i did it correct ?

thanks.

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the physics looks good. i cannot verify that you have the correct molar mass, but i assume you looked it up in a reputable source. :)

cheers

well the molar mass CH4 16.0426.

and sure thanks for helping :)

cheers