Avogadro constant

Proposals Concerning the Modifications of " Amount of Substance ", " mol " and the Definition and Symbol of Avogadro Constant

关于修改物质的量、摩尔及阿伏伽德罗常数的定义和符号的建议

In the meanwhile , re-determination has been made on " Avogadro constant " as well as on atomic weights of a number of elements .

同时，对元素原子量标定，乃至阿伏伽德罗常数等基本常数的标定也起了重要作用。

Measurement of Avogadro Constant

阿佛伽德罗常数的测定

Through the international cooperation the metrologists are striving to redefine the mass standard depending on unchanging properties of nature based on the concept of Avogadro constant and planck 's constant .

近年来，计量学家通过国际合作，试图基于自然的不变性质、阿佛加德罗常数和普朗克常数的概念重新定义质量基准。

The question is raised whether it would not be useful to define the Avogadro constant to 6 significant digits exactly , pending a further improvement of its determination to an uncertainty of < 1 · 10 - 7 N A.

问题起因是严格限定阿伏伽德罗常数6位有效数字是否无用，使得进一步改进测量不确定度至<10-7NA的提议悬而不决。

By measuring the volume of hydrogen gas which is produced by an amount of metal reaction with excessive dilute acid , the number of hydrogen moleculars can be calculated from the gaseous state equation and the mass of hydrogen molecular , thereby , Avogadro constant can be obtained

通过测定一定量的金属与过量的稀酸反应产生的氢气的体积，由气态方程和氢分子的质量可以计算出氢分子个数，从而得到阿佛伽德罗常数