This will be the definition of the mole as the amount of carbon weighing exactly 12 grams, so I would like to know now how many particles, how many carbons are there in that mole.

摩尔的定义就是,12克的碳的数量，我想知道有多少粒子，一摩尔会有多少碳粒子。

麻省理工公开课 - 固态化学导论课程节选