Ncert Exercises & Solutions

What is the symbol for SI unit of mole? How is the mole defined?

Symbol for SI unit of mole is mol.

One mole is defined as the amount of a substance that contains as many particles and there are atoms in exactly 12 g (0.012 kg) of the ¹²C-isotope.

\frac{1}{12} g of {}_{12}C - isotope = 1 mole