Question

2. What is mole? What is the unit of mole? How many molecules are there in a certain mass of a
substance?
matal​

Answer 1

Explanation:

Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles

The mole, symbol mol, is the SI unit of amount of substance

Mole is the amount of any substance which contains Avogadro number(6.022×10²³) no of particles.

Answer 2

Answer:

Avogadro Number ( 6.022×10²³ )