% Transmittance 105 100 95- 90- 85- 80 75- 70- 65 60 55 45- 6 G 40- 35- 30- 25 20- 15- 10 50 2000 ds Scanned with CamScanne enumbers (cm-1) 3000 2500 mmmm 150 1000 500

4 ¹H-NMR Spectra 1 3) M.F. = C₂H₂OBr 21 21 3 2) 2 PPM

An HDI of 3 is consistent with this structure. O True O False CH₂

1: Determine nominal m/z value peak 2: Assign the X+2 elements except oxygen (Br, Cl, Si, S) FIRST 3: Assign the X+1 elements (C & N) If N is known to be present, start with N remember to normalize X+1 to X, if necessary (when the X peak is not the base peak in the isotopic cluster) 4: Assign the atoms of oxygen after assigning number of C atoms because of the X+2 contribution from carbon6 can influence the assignment of the number of O atoms 5: Assign the X elements (hydrogen7 , F, P, I) 6: From the elemental composition, determine R+db 7: Propose a possible structure

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Define Absorption spectroscopy

How can you tell which one is the red light or the UV region light?

Please do clearly Simple question