Answer:-
A mole, in chemistry, is a fundamental unit that measures the amount of a substance. Defined as 6.022 x 10²³ particles (Avogadro's number), it represents atoms, molecules, or ions in a given sample. This number allows chemists to work with large quantities at a manageable scale, linking microscopic particles to real-world measurements. For example, one mole of water contains 6.022 x 10²³ water molecules, and its mass corresponds to the molecular weight in grams. The mole simplifies complex calculations, making it a cornerstone in chemistry for balancing reactions, measuring compounds, and understanding atomic relationships.
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