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May I have some help with this particular problem?

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Cory,
 
      The relationship is μ rms = (3RT/M)½

where
μrms = root mean square velocity in m/sec
R = ideal gas constant = 8.3145 (kg·m2/sec2)/K·mol
T = absolute temperature in Kelvin
M = mass of a mole of the gas in kilograms.
 All you have to do is calculate the speed for H2 at 25 deg C and then substitute the mass of a CO2 molecule and solve for the temperature.
Hope this helps
Jim