...求原子个数比, 确定最简式: C : H: O =12 :1 :16 = x: y: z 最简式为 CxHyOz (2) 设分子式, 求 n 值: 设分子式为(CxHyOz)n ,则分子量M=(12x+y+16z) ×n 即: n(C) = 12%%HM × n(O) =16%OM × . .
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氢气的分子式为H2,它是一种无色、无溴和无味的气体。
Hydrogen is referred to as H2. It is a colourless, odourless and tasteless gas.
一种甾醇,分子式为C29 H 48o,从大豆或卡拉巴豆中提取。
A sterol, C29H 48o, obtained from soybeans or Calabar beans.
最后确定样品可能是飞燕草色素-3-葡糖苷,分子式为C21H21O12。
At last confirming the pigment was delphinidin-3-O-glucoside, the molecular formula is C21H21O12.
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