[References] Classify the following substituents according to whether they are electron donors or electron acceptors relative to hydrogen by the resonance and the inductive mechanisms. 1. 2. 3. -Ħ: fluoro :0: ethylcarbamoyl Inductive effect OCH₂CH3 Submit Answer acetoxy CH3 Resonance effect Inductive effect Inductive effect Resonance effe ✓ Resonance effect Retry Entire Group 2 more group attempts remaining acceptor donor no effect ◊ Ⓒ

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Q: SH NaOH, H₂O, Br₂ ? Predict the major product of the given reaction.

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Q: Which of the following resonance structures is the most stable? 11 ||| IV II III IV

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Q: ¹H NMR 13C NMR 70 PPM 46 PPM 30 20 16 10

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Q: Standard deviation of data: 206.3, 205.5, 205.8 Mean-205.9

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Q: An aqueous solution is 28.5 % lithium chloride, LiCl, by mass. The density of the solution is 1.127…

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.