Problem - BP35 A molecular bond can be modeled as a spring between two atoms that vibrate with simple har- monic motion. The figure below is an approximation to the potential energy of an HCl molecule for small exci- tation energies. The chlorine atom is much more mas- sive than the hydrogen atom, so assume that the hydro- gen atom (with mass m = 1.67 x 10"27 kg ) vibrates back and forth while the chlorine atom remains at rest. Using Band length jom) the graph, estimate the vibrational frequency of the HCI molecule