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Define a mole. Give the significance of the mole.
One mole of any species (atoms, molecules, ions or particles) is that quantity or number having a mass equal to its atomic or molecular mass in grams.
1 mole = 6.022 x 1023 in number (atoms, molecules, ions or particles)
Significance of the mole
1. A mole gives the number of entities present i.e, 6.022 x 1023 particles of the substance.
2. Mass of 1 mole is expressed as M grams.
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