Average kinetic energy of CH4 and N2 at 294 K and 574 K

[ironizer]

Gas Law problem... please help

Calculate the average kinetic energies of the CH4 and N2 molecules at 294 K and 574 K.

I've tried every possible way I could think of. I can't get the right answer. I don't know what equation to use anymore, I've done it all and nothing works.

I got all these answers:

676
4.06e-21
4333.34
J/molecule 3 sig figs
And none of them are good. I'm getting annoyied, someone give me a hint please. Thanks

 

[Borek]

What equations have you tried to use?

 

[ironizer]

KE= 3/2 RT

sqrt[3RT/M]

and KE=(3/2)RT/avo's number

 

[ironizer]

Thank-you all for the help.


I figured it out myself.

 

[Borek]

Sorry, somehow I missed your previous answer