Mole is a counting device or a number like: 12 things   =  Dozen 144 things  =  Gross 2 things = Pair 1000 g    =   1k g similarly: 6.022 x 1023 particles =1 mole Mole Definition: In Chemistry , mole is defined as the amount of substance that exactly contains 6.022 x 1023 particles. . ForAvogadro’s Number and Mole – How is Mole Calculated