2. What is the SI
definition of mole?
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The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 x 1023 elementary entities. This number is the fixed numerical value of the Avogadro constant, NA, when expressed in the unit mol–1 and is called the Avogadro number.
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The symbol of moleis mol,is amount of substances. One mole exactly contain 6.022 ×10^23 elementary entities.
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