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汉语拼音：fēn zǐ shì

用元素符号表示物质分子组成的式子。如甲烷的分子式为CH4。它能表示组成分子的各元素的原子数比和质量比，并能 据此计算相对分子质量。

1. 用元素符号表示某物质分子组成的式子。

• The chemical formula for water is H 2 O.

  水的化学分子式是H2O.

• The precise molecular weight that is measured can be uniquely associated with a specific moleculer formular.

  测得的准确分子量与具体的分子式完全吻合.

• From the molecular formula alone , we can deduce the " degrees of unsaturation " in the molecule.

  仅从分子式, 我们就能推断分子中的 “ 不饱和度 ”.

• The molecular formula shows nothing but the total member of carbon and hydrogen atoms.

  分子式只不过表示碳和氢原子各自的总和.

• Substances which have identical molecular formulas but different strucural formulas, are known as isomers.

  凡具相同分子式但不同结构式的物质称为异构体.

• Ammonium Molybdate is also called Ammonium Tetramolybdate ( ATM ) according to the formula.

  钼酸 铵 按其分子式又可称为四钼酸铵.

• Its average molecular weight is 1387, and average molecular formula is C 101 H 90.7 O 3.6 N 2.

  分析得到其平均分子量为1387, 平均分子式可写成为C101H90.7O3.6N2.

• Glyceraldehydes ( CHOCH ( OH ) - CH 2 OH ) A simple monosaccharide bearing an aldehyde group.

  甘油醛:分子式为[CHOCH ( OH ) -CH2OH ],它是具醛基的一种简单的单糖.

• Acetone ( or dimethyl ketone ): Simplest and most important ketone ( CH 3 COCH 3 ) .

  丙酮: 亦称二甲基酮:分子式为 CH3COCH3,最简单和最重要的酮.

• This is the molecular formula of diazine.

  这是氯哒嗪的分子式.

• Oxygen is referred to as O 2.

  氧的分子式是02.

• The chemical formula for water is H 0?

  水的化学分子式是H0?

• This is what the molecular frmula means.

  这就是此分子式的含义.

• What is the formula for water?

  水的分子式是什么?

• The molecular formula, C 6 H 14 anything except the total number of carbon and hydrogen atoms.

  分子式C6H14只用来表示碳原子和氢原子的总数.