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HOW IS A MOLE AND MOLECULAR NUMBER IS DIFFERENT?
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12. When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles, or specified groups of such particles.

One mole is defined as No entities of the substance, where No is equal to Avogadro’s number. No is generally taken as 6.022X1023. If need be, then we may use still closer approximation of this number.
The difference between a mole and a molecular weight is that one mole of a substance is equal to their molecular weight. If you wanted more than one mole of a substance than you would multiply the molecular weight.


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