A mole in chemistry mean a measurement. Or in other words 602 billion trillion
The development of the mole as the standard unit of measurement for calculating the elementary entities contained within a substance has a history that dates back to the first table of relative atomic mass, was crafted by John Dalton in 1805.
A mole allows a chemist to weigh out the number of substances.
It provides a bridge between an atom and visible amounts of a substance.