Essential Chemistry for IGCSE - Chemical Calculations (Section 2 - No. 49)
Which of the following statements best describes a 'mole'?
The mass of a substance.
The volume of a gas.
A unit of measurement for the amount of substance, equal to the number of atoms in 12 grams of carbon-12.
A measure of the concentration of a solution.
Explanation
A mole is a unit representing a specific number (Avogadro's number) of entities (atoms, molecules, etc.) of a substance.
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