［知识要点］ １．物质的量（ｎ） 物质的量是国际单位制中七个基本物理量之一，表示含有一定数目粒子的集体． 二．物质的量的基准（ＮＡ） 以０．０１２ｋｇ所含的碳原子数即阿伏加德罗常数作为物质的量的基准，其近似值为６．０２ × １０ｍｏｌ－１ ３．摩尔（ｍｏｌ） 摩? [Knowledge points] 1. Amount of Substance (n) The amount of Substance is one of the seven basic physical quantities in the International System of Units, representing a group containing a certain number of particles. two. The basis for the amount of material (NA) is based on the amount of carbon atoms contained in 0.012 kg, that is, the Avogadro’s constant as a reference for the amount of the substance, and its approximate value is 6.02 × 10 mol-1. Moore (mol)