早在1791年德国化学师李希特提出了当量的概念。尔后,在化学发展史上当量和当量定律起过重大的作用。自从1971年第14届国际计量大会决议,在国际单位制中增加基本单位摩尔之后,曾有人提出用摩尔取代当量,即以半个原子、半个分子或其它分数的原子、分子为基本单位,便可以用摩尔取代克当量。但该文没有指出这些分数的意义及计算方法。本文以克 As early as 1791 German chemist Richter proposed the concept of equivalence. Later, the law of equivalence and equivalence played a major role in the history of chemistry. Since the resolution of the 14th International Conference of Weighing in 1971, adding Moore to the basic unit of the International System of Units, it has been proposed to replace the equivalent with moles, that is, atoms, molecules, half-atoms, or other fractions of atomic units, You can use molar equivalents instead of gram. However, the paper does not point out the meaning of these scores and the calculation method. This article in grams