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Explain the mole concept. |
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Answer» Wilhelm Ostwald introduced the term mole (Latin ‘moles’ means heap), in 1896 which was accepted as a unit to represent a large number of atoms in 1967. The Mole is the amount of a substance which contains as many particles as in 12g of C12. Thus, one mole of any species is that quantity in number which has a mass equal to its atomic or molecular mass in grams. For example, 1 mole of carbon isotope (atomic mass = 12) is equal to 12g. 1 mole of oxygen (O2, molecular mass = 2 x 16) is equal to 32 g. 1 mole of water (H2O, molecular mass = 2×1 + 1×16) is equal to 18 g |
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