Dear student

In chemistry one mole of a substance is defined as the amount of substance containing as many elementary entities (atoms, molecules, ions, electrons, radicals, etc.) as there are atoms in 12 grams of carbon - 12(6.02310 ^23).

The mass of one mole of a substance equals to its relative molecular mass expressed in grams. Mole defines the quantity of a substance. One mole of any substance will always contain 6.02210 ^23
particles, no matter what that substance is.

Therefore, we can say:
1 mole of potassium atoms (K) contains 6.02210 ^23
potassium atoms.
1 mole of potassium ions (K +) contains 6.02210 ^23
potassium ions.
1 mole of hydrogen atoms (H) contains 6.02210 ^23
hydrogen atoms.
1 mole of hydrogen molecules (H 2 ) contains 6.02210
23
hydroger molecules.

Hi aspirant,

One mole of a substance is equivalent to 6.022x10^23 units of that substance which can be atoms, molecules etc. The value 6.022x10^23 is known as Avagadro's number. This unit is used for conversions between mass and number of particles like atomic mass and atomic number or molecular mass and molecular number of that particular substance.

Hi,

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles of any substance or as it is called matter.