7. a) Calculate the absorption frequency of 2H9F stretch vibratio frequency of vibration of 'H19F molecule is 4053.3 cm1. Repeat the calculation for the 3H°F molecule and comment on your results. n if the observed b) For each molecule and/or mode presented below, indicate which vibration or vibrational mode is IR active and/or Raman active then state yours reason(s) IR Active Raman ActiveReason(s) i) O2 ii) sym. CO2 iii) asym. CO2 7. a) Calculate the absorption frequency of 2H9F stretch vibratio frequency of vibration of 'H19F molecule is 4053.3 cm1. Repeat the calculation for the 3H°F molecule and comment on your results. n if the observed b) For each molecule and/or mode presented below, indicate which vibration or vibrational mode is IR active and/or Raman active then state yours reason(s) IR Active Raman ActiveReason(s) i) O2 ii) sym. CO2 iii) asym. CO2