Question

what is mole and what is si unit of mole

Answer 1

One mole of any species are the quantity which is expressed in a number having equal to its atomic or molecular mass in grams

Answer 2

https://en.m.wikipedia.org/wiki/Mole_(unit)
Mole (unit) - Wikipedia
https://en.m.wikipedia.org/wiki/Mole_(unit)
Mole (unit) - Wikipedia