1a. Which is more energetic, a 300nm or 400nm light?

3627 cm-1

Deduce the energy change in KJmol-1 for the reaction HCI + D2 – DCI + HD and state whether the reaction is endothermic or exothermic. [Hint: consider the zero point energies of the molecule].

5(a) What is a normal mode of a Vibration? Predict the expected number of normal modes of vibration for the following molecules: (i) OCS (linear); PtF6; C6H6

• (B). If a nuclear magnetic resonance spectrometer operates at a filed strength of 75.435 Tesla, calculate the operating frequency of the spectrometer for a carbon – 13 resonance ( = 5.051 x 10-27 JT-1 gc-13 .404].