Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

In an \( \text{HCl} \) molecule, the separation between the nuclei of the hydrogen and chlorine atoms is \( 1.27 \text{ \AA} \). If a chlorine atom is \( 35.5 \) times as massive as a hydrogen atom, the location of the centre of mass of the molecule measured from the hydrogen nucleus is:

1. A
   \( 0.035 \text{ \AA} \)
2. B
   \( 0.635 \text{ \AA} \)
3. C
   \( 1.120 \text{ \AA} \)
4. D
   \( 1.235 \text{ \AA} \)