Question

What is the difference between a mole and Avogadro’s constant?

Answer 1

Mole and Avogadro’s constant is related to each other. A mole consists of a number of atoms of a substance. However, in a mole, the atoms are so small that they are not possible to be counted individually. One mole of a substance can be used to mention the number of atoms or molecules of a substance represented by ‘n’.

Complete Step By Step Answer:
We know that one mole of atoms/ molecules of a substance consists of $6.022\text{ }\times \text{ 1}{{\text{0}}^{23}}$ atoms/molecules. The number of atoms of molecules or atoms in one more is permanent. This fixed number of atoms or molecules in a mole is called the Avogadro’s number or Avogadro’s constant.
$Number\text{ }of\text{ }moles\text{ (n) = }\dfrac{Given\text{ mass of element}}{Molar\text{ mass of element}}\text{ = }\dfrac{m}{M}$
Here the Avogadro’s number is similar to the molar mass of an element that is always fixed.
So by using Avogadro’s number we can find the number of moles.
Let, N = given number of atoms
No = Avogadro’s number
$\therefore \text{ n = }\dfrac{N}{{{N}_{o}}}$
For example, one mole of Nitrogen will consist of Avogadro’s number of atoms in it.
Mole and Avogadro’s constant are the same as 12 and a dozen. They are closely related but they are not the same. These terms are widely used by scientists to denote the number of atoms of an element.

Note:
The number of moles of a substance can be used to convert the mass of a substance into the number of particles it consists of. Also, remember that the mole of a substance is the same as the molecular weight of the substance. Avogadro’s number is also referred to as the absolute number.