1. The problem statement, all variables and given/known data The mass of the deuterium molecule D2 is twice that of the hydrogen molecule H2. If the vibrational frequency of H2 is 1.22 × 1014 Hz, what is the vibrational frequency of D2, assuming that the “spring constant” of attracting forces is the same for the two species? Answer in units of Hz. 2. Relevant equations Iowo=Ifwf Io/f=(1/2)mr^2 3. The attempt at a solution I want to use the above equation to solve this problem but I do not think that is the correct equation to use. There are too many variables that are not given in the question that I don't believe we are expected to know.