Find the average magnitude of linear momentum of a helium molecule in a sample of helium gas at `0^(@)C.` Mass of a helium molecule`=6.64xx10^(-27)kg`and Blotzmann constant `=1.38xx10^(-23) J K^(-1).`

Find the average of magnitude of linear momentum of helium molecules in a sample of helium gas at temperature of 150 piK . Mass of a helium molecules =(166//3) xx 10^(-27) kg and R = 25//3J-mol^(-1)K^(-1)

Estimate the average thermal energy of a helium atom at (i) room temperature (27^(@)C) . Boltzmann constant =1.38 xx 10^(-23) JK^(-1)

A gas molecule at the surface of earth happens to have the rms speed for the gas at 0^(@)C . Suppose it went straight up without colliding with other molecules, how high it would rise? Mass of the molecule is 4.65 xx 10^(-26) kg . Boltzmann's constant = 1.38 xx 10^(-23) JK^(-1) .

Calculate the average momentum of a hydrogen molecule at 20^(@)C . Boltzmann constant =1.38xx10^(-23) JK^(-1) and mass of a hydrogen molecule =3.2xx10^(-27)kg .

At what temperature will the average velocity of oxygen molecules be sufficient so as to escape from the earth ? Escape velocity of earth is 11.0 kms^(-1) and mass of one molecule of oxygen is 5.34xx10^(-26) kg. Boltzmann constant =1.38xx10^(-23) " J molecule"^(-1) K^(-1) .

The average K.E. of a hydrogen gas molecule at STP will be (Boltmann canstant k_(B)=1.38xx10^(-23)JK^(-1).......