In this passage, the quotation is well-introduced. The author of the quotation is identified, as is the quotation's relation to the previous statement. From the introduction, the reader can detect the contrast between the quotation and the first sentence of the paragraph. Achieving Variety when Introducing Quotations.
(also cinnamic aldehyde, Î²-phenylacrolein), C 6 H 5 CH=CHCHO, a fatty-aromatic unsaturated aldehyde; a colorless liquid with the characteristic odor of cinnamon. It has a boiling point of 252Â°C and a density of 1.110 g/cm 3 (at 20Â°C). It is poorly soluble in water and very soluble in alcohol and ether. Cinnamaldehyde is a component of many essential oils (cinnamon oil and others).
But 1-hexanol (C6H14O) is only partially soluble in water. Compounds that are less polar, like diethyl ether (C4H10O) aren't soluble at all in water. When two compounds are mutually insoluble they're immiscible with each other: water is not miscible with diethyl ether.So when you mix hydrocarbons with water, they tend to form layers.Water is more dense than more hydrocarbons, so it is usually the bottom layer.The organic (hydrocarbon) layer is usually on top.ecause what is polar and more hydrocarbons are non-polar. The rule rule like dissolves in like.. Hydroxyl (-OH) groups are very polar. But alkyl (-CH3, -CH2CH3 etc.) groups are non-polar.