1. n-Propyl acetate (bp 102°) evaporates rapidly when exposed to air, but water (bp 100°) does not. Explain. 2.During a distillation, you observe that the thermometer bulb is dry. List at least three possible causes, and state what you should do in each case. 3.When a solvent is used to extract a small amount of a high-boiling product from a reaction mixture, it is common practice to first distil the solvent by simple distillation, transfer the residue to a smaller flask, and isolate the product in a second distillation. Why not just continue the first distillation to isolate the product? 可以請知道的大大回答我一下嗎?? 感激不盡 XD --

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