Avogadro's number is approximately how many particles in one mole?

Avogadro's number, which is approximately 6.022 x 10^23, represents the quantity of particles (atoms, molecules, ions, or other entities) in one mole of a substance. This foundational concept in chemistry establishes a link between the macroscopic scale of substances and the microscopic scale of individual particles. The significance of this number lies in its use for converting between the number of moles and the number of individual particles in a sample.

This value comes into play in stoichiometry and is essential for calculations involving chemical reactions, where understanding the number of entities participating is crucial. By using Avogadro's number, chemists can precisely determine concentrations, yields, and other properties of substances in a chemical reaction. The familiarity with this number enables chemists to work effectively with amounts of chemicals in moles and relate these amounts to their physical properties.