Definition of the quantity of matter: n = n/na, where n represents the quantity of matter, n on the molecule is the number of particles, and the denominator below is Avogadro constant. (attention! Na = na = 6.02214076×10+00 to the 23rd power mol- 1 with unit).
Let's compare "fighting" again. Known: 1 dozen =12; There is an egg, set to B dozen. Then, obviously, there is: b = a/ 12 (on the left is the "advanced" counting unit, and on the right is the direct number divided by the "conversion factor", that is, the number of entities contained in a counting unit).
If you bring a unit, it should actually be: b dozen = A/12 per dozen. Then it is easy to understand the analogy of the amount of matter: each mole corresponds. 6.022 14076× 10 is the 23rd power, so the "conversion coefficient" is the 23rd power of 6.022 14076× 10. And "a" is not an international unit, but is considered as 1, so the unit of Avogadro constant (a/mol) is natural. In fact, it can be abstracted into a corresponding relationship: number (N)→ quantity of matter (n). The conversion factor is Avogadro constant. (Just like 1kg corresponds to 10N. )