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.
Moles is an appropriate unit of measurement for amount of substances
Note that:
The unit of measurements are the generally agreed standards of measurements for particular quantities.
The amount of a substance is described by using moles as the unit. This is to ensure that considerably large quantities of small entities are measured.
Therefore, the mole is an appropriate unit of measurement for the amount of a chemical substance
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