Rel. Intensity Q 1. Which one of the following is true of the compound whose mass spectrum is shown here? Explain how you decided. 100 a) It contains chlorine. b) It contains bromine. c) It contains neither chlorine nor bromine. 80- 60- 40- 20- 0.0 0.0 TT 40 80 120 160 m/z 2. Using the Table of IR Absorptions how could you distinguish between these two compounds in the IR? What absorbance would one compound have that the other compound does not? HO CI

6.

IR spectra OF SOLID UNKNOWN List all the important peaks that can be used to determine the functional groups present in your solid unknown in the table below.    Peak Position cm-1 Peak Characteristics (weak, strong, sharp, broad etc...) Bond type(sp3 C-H, C=C, C-O, O-H, C=O etc...) Functional Group (alkyl, aromatic, aldehyde, alcohol etc...)

Mass spectroscopic.  What is the isotopic peak pattern of each : Organic compound with 2 bromine atoms. Organic compound with 2 chlorine atoms.

Does a calibration curve alwasy compare concentration and absorbance? Or can it compare concentration and %T as well?

you have an uknown compound you need to identify its EI mass spectrum shows a peak at m/z 198 with an intensity of 57, and a peak at m/z 200 with an intensity of 19. there are no peaks with m/z 200. what does this mean? A. the compound contains a nitrogen atom B. the compound contains approximately 30 carbon atoms C. the compound contains a bromine atom D. the compound contains a chlorine atom

Please answer the question correctly is all I want and explain why its thats answer for the final and please answer as quickly as possible, thanks!

Watch videos (LINKS) on page 2 and answer questions One infrared spectra (1) is given below. (a) Analyze the spectra and tabulate important bands. (b) Circle the possible molecular structure corresponding to the given spectra. Spectra A: 4000 2700 cm ¹ 2700- 2000 cm ¹ 2000 1600 cm 1600 - 400 cm ¹ 2.5 100 80 Region 60 40 20 0 OL 4000 (a) COMPOUNDS A OH 3500 3 -1 3000 B Absorption, cm -1 3.5 4 2500 4.5 SPECTRA 1 CH, O CH, C C CH, H H NO H wavelength (um) 5 5,5 6 2000 1800 1600 wavenumber (cm) wavelength (um) C Functional group CIC C-OH CH, 7 8 1400 1200 D 9 10 n 1000 CH₂CH₂OH - 11 Base Value 12 13 14 15 16 800 600 E Jun CH₂-C-N

5. Use the mass spectrum to propose a molecular formula for the compound. Show your work. 100 80 60 (M)* m/z = 87 intensity = 35% 40 (M+1) m/z = 88 intensity = 2% 20 0.0 0.0 20 40 60 80 100 m/z Rel. Intensity

What is the %T of a sample with an absorption value of 0.463 at 523 nm