Explain with examples what is meant by 'mole' of a substance
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A mole corresponds to the mass of a substance that contains 6.023 x 1023 particles of the substance. The mole is the SI unit for the amount of a substance. Its symbol is mol. By definition: 1 mol of carbon-12 has a mass of 12 grams and contains 6.022140857 x 1023 of carbon atoms (to 10 significant figures). Examples
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→ One mole 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(6.023×10^23).
→ The mass of one mole of a substance equals to its relative molecular mass expressed in grams.
→ Mole defines the quantity of a substance.
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