Calculate the kinetic energy of co2 at 254 k.

You need to take into account the equations for the average speed and kinetic energy of gases.

Kinetic energy, KE = [1/2] m * v^2

Average speed, v = √[3RT/m] = > v^2 = 3RT / m

=> KE = [1/2]m * 3RT/m = [3/2] RT

R = 8,314 J/mol*K

T = 254 K

=> KE = [3/2] * (8,314J/mol*K) * (254K) = 3167.6 J/mol

Answer: 3167.6 J/mol