Two Tanks of Gas, One of Hydrogen, H₂, and One

Multiple Choice

Two tanks of gas, one of hydrogen, H₂, and one of helium, He, contain equal numbers of moles of gas. The gram-molecular mass of He is twice that of H₂. Both tanks of gas are at the same temperature, 293 K. Which statement(s) below is(are) correct when we ignore vibrational motion?

A) The total internal energy of the hydrogen is the same as that of the helium.
B) The total internal energy of the hydrogen is 1.4 times that of the helium.
C) The total internal energy of the helium is 1.4 times that of the hydrogen.
D) The total internal energy of the hydrogen is 1.67 times that of the helium.
E) The total internal energy of the helium is 1.67 times that of the hydrogen.