Helium atom is two times heavier than a hydrogen molecule

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

Helium atom is two times heavier than a hydrogen molecule. At

298\text{ K}

, the average kinetic energy of a helium atom is : (1) Two times of a

H_2

molecule (2) Same as of

H_2

molecule (3) Four times of a

H_2

molecule (4)

1/2

H_2

molecule