t6) How many normal modes of vibration and in molecule Haadinear) . (d) 9 3(b)5
ID: 711480 • Letter: T
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t6) How many normal modes of vibration and in molecule Haadinear) . (d) 9 3(b)5 (a) 3 (7) For diatomic molecules vibration-rotation Infrared (IR) spectra? (d) HF HCl (b) co For pol-atomic moleculo which on of te following molecules, the vibrational IR-Raman exclusion rule applies? C > (b) HC 1402 / (d) So2 (a) HO CH 2. Problems: 1. An aqueous solution of disodium fumarate has the concentration of 5 x 10 mol/L. In its spectroscopic study at 25°C, the solution is put into a 1 cm sample cell, and the result shows a spectral peak at 250 am, and the percentage of transmittance (T equals to 19.2%. (a) Calculate its absorbance A. (b) Calculate its molar absorption coefficient &.(10 points) a)-log log 192 : 0. 31Explanation / Answer
according to Rule of mutual exclusion pricncipal, IR active bonds are raman inactive and vice versa for a centro-symmetric molecule.
therefore, there is no center of symmetry for H2O2 molecule. Hence, both IR and Raman will be active for H2O2.
answer of the other questions are right.
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