I need help solving these for practice. I would like a short explanation for the

Question

I need help solving these for practice. I would like a short explanation for the answer choice. thank you.

7) [5pts] which compound gives rise to the IR spectrum below? 100 E 50 1000 2000 4000 3000 wave number CH,CH CH CH,OH CH,CH CH CH NH c) CH CH,CH,CH d) CH CH CH COH 8. (5pts) Which compound has the smallest HOMO-LUMO gap and absorbs at the longest wavelength in the UV- Visible portion of the spectrum? 9. [5pts] The presence of which element is indicated by a peak at m/z 127 and a characteristic 127-unit gap in the mass spectrum? (or (c) N

Explanation / Answer

7] d

CH3CH2CH2COOH

broad peak between 2500 and 3500 cm-1 ----> because of presence of acid group

9] c

iodine

Atomic weigh tof Iodine = 127

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