Question

what is mole concept.explain it plz fast.

Answer 1

Molecules and atoms are extremely small objects - both in size and mass. Consequently, working with them in the laboratory requires a large collection of them. How large does this collection need to be? A standard needs to be introduced. This standard is the "mole". The mole is based upon the carbon-12 isotope. We ask the following question: How many carbon-12 atoms are needed to have a mass of exactly 12 g. That number is NA - Avogadro's number. Thus, NA is defined by

NA x (mass of carbon-12 atom) = 12 g

Answer 2

a mole is an amount of substance of a system which contains as a elementary units
one mole of an atom/ molecule contain= Avogadro number / molecule
hope its help u and best of luck for study if u like plzz follow me
number of moles= weight/ molecular weight