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what is mole? what is the relation of mole and molar mass? how is avagardo number related to mole ?(if the number of particles in one mole of a substance is equal to avagardo number should we have to multiply the to avagardo number?)
Mole:
          One mole of an element is equal to the Avogadro's no. of atoms/ molecules of that element = Atomic / Molecular mass of the element.

For ex:
    1 mole of Na = 6.023 x 1023 Na atoms = 23 gm of Na

If there is 2 moles of Na then
  2 x 6.023 x 1023 Na atoms or
  2 x 23 gms of Na


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