The characteristic rotational energy for KCl is 1.43×10−5eV. The mass of a K atom is 39.10amu. There are two Cl isotopes; take the average mass of a Cl atom to be 34.45 amu. One amu (atomic mass unit) is 1.661×10^−27 kg.
a. Find the reduced mass for the KCl molecule.
b. Find the separation distance of the K+and Cl−ions.
