Question

what is a mole.....​

Answer 1

The mole is the unit of amount in chemistry. ... A mole of a substance is defined as: The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C.

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Answer 2

The mole is the base unit of amount of substance ("number of substance") in System International (SI), defined as exactly 6.022 ×10²³ particles, e.g., atoms, molecules, ions or electrons. Its symbol is mol.