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本帖最后由 醉酒当歌 于 2014-4-20 23:48 编辑
1 ?. W+ f4 G5 F8 V$ mwlwlwlwl 发表于 2014-4-20 22:52 + Z4 D5 m: p* H$ U
我真是不知道你查的是哪本书。问你,ketone的分子式 RC(=O)R' 能写成 Cm(H2O)n 的形式么?
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: P+ E3 o8 M4 N+ d2 A0 GA carbohydrate is a large biological molecule, or macromolecule, consisting of carbon (C), hydrogen (H), and oxygen (O) atoms, usually with a hydrogen:oxygen atom ratio of 2:1 (as in water); in other words, with the empirical formula Cm(H2O)n (where m could be different from n).[1] Some exceptions exist; for example, deoxyribose, a sugar component of DNA,[2] has the empirical formula C5H10O4.[3] Carbohydrates are technically hydrates of carbon;[4] structurally it is more accurate to view them as polyhydroxy aldehydes and ketones.[5]! y* ?5 I5 ?) K) Q" X! l- d
/ c$ }3 N. @. A& K! w& H2 Z7 o全称是Polyhydroxyl Ketone or polyhydroxy aldehydes. 你说的分子式没错。+ I3 y$ A9 d; _+ m7 }$ ^" b3 b; V
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Carbonhydrates不是都能吃。你说的充分还是必要条件,本身就与你的逻辑命题相违背。 |
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