87.62 88.91 91.22/ 92.91| 95.94| (98) | 101.1 56 57 72 73 74 75 1 76 Ba LaHf TaW Re Os ã§) 108 Hs nsaded 11. (20 pts) Consider the linear triatomic molecule SECES. (a) How many normal modes of vibration are there for this molecule? (b) Predict the number of absorption bands in the IR spectrum of CS2 (c) Predict the number of absorption bands in the Raman spectrum of CS2 (d) Co2 is isoelectronic and isostructural with CS2. Which band would you expect venumber, the C O stretch or the Ces stretch. Explain. to appear at higher wa Assume similar force constants for the two types of bonds. 12. (10 pts) Why is the detector in-line with the source for absorption measurements while it is at a 90°angle to the source in fluorescence measurements? .(10 pts) What length (in cm) of mirror drive in a Michelson interferometer is required to produce a resolution sufficient to separate infrared peaks at 30000 and 3000.5 cm