How are a mole and a dozen similar?
A mole is just a name given to describe how many 'things' there are.
It's not that confusing as it seems so let me give you an example.
A dozen, as you know, is a common term used to describe something that contains
A dozen eggs is just saying we have
Similarly, a mole describes that there are
You can even use moles to describe how many hairs are on your head, how many moles of sand grains there are, etc; moles is just a name given to describe how many of 'something' you have.
It is more convenient for chemists to describe reactions and molecules by moles instead of saying, "We reacted