The mole was the final base unit to be included in the International System of Units. This article explores: our understanding of the mole and its characteristics; its relationship with the base quantity, amount of substance, of which it is the base unit; and when alternative ways of expressing measurement results would be preferable. Importantly, since the SI is a practical system, this article also develops an understanding of when the concept of the mole is useful and meaningful. An important outcome is that the mole must consider elementary entities located in close enough vicinity such that they could, in theory, react or interact with each other stoichiometrically. Further, it is observed that the majority of practical uses of the mole relate to describing the composition of mixtures where, unusually, the concept of a mole of dissimilar elementary entities is often advantageous. It is also noted that where ratio and fractions are used it is essential to display the measure...

中文翻译：

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什么是痣？

mole鼠是国际单位制中最终使用的基本单位。本文探讨：我们对痣及其特征的理解；它与基本量，物质量（以基本量为单位）的关系；以及表示测量结果的其他方式更可取时。重要的是，由于SI是一个实用的系统，因此本文还将对the鼠的概念何时有用和有意义产生一种理解。一个重要的结果是，该摩尔必须考虑基本实体，它们之间的距离应足够近，以使它们在理论上可以化学计量地相互反应或相互作用。此外，观察到该摩尔的大多数实际用途与描述混合物的组成有关，其中通常 一摩尔不同的基本实体的概念通常是有利的。还应注意，在使用比率和分数的情况下，必须显示度量...