Nitrogen molecules are 14 times more massive than hydrogen molecules. If samples of these two gases are at the same temperature, what must be true about the motion of the molecules?

a. The rms molecular speed is the same for both gases.
b. The average kinetic energy is the same for both gases.
c. The rms speed of the hydrogen molecules is 1–√4 times greater than that of the nitrogen molecules.
d. The rms speed of the hydrogen molecule