What does Avogadro's constant represent?

Avogadro's constant represents the number of atoms, molecules, or particles found in one mole of a substance, regardless of the type of substance. Specifically, Avogadro's number is approximately (6.022 \times 10^{23}). This fundamental concept in chemistry establishes a relationship between the mass of a substance, expressed in grams, and the number of atoms or molecules it contains.

Understanding Avogadro's constant is crucial for stoichiometry, as it enables chemists to convert between the macroscopic scale of grams and the microscopic scale of individual atoms and molecules. This allows for calculations concerning reactions and the amounts of substances involved, making it an essential part of chemical education and practical applications.

The other options do not accurately describe Avogadro's constant; they pertain to different concepts in chemistry, such as ion concentration, gas properties, and molar mass, which are distinct from the definition of the mole and what Avogadro's constant signifies.