What is the value of Avogadro's number?

Avogadro's number, defined as the number of particles (atoms, molecules, ions, etc.) in one mole of a substance, is approximately 6.022 x 10^23. This value is fundamental in chemistry as it allows for the conversion between atomic scale measurements and macroscopic amounts of a substance that can be measured in the laboratory.

The significance of Avogadro's number lies in its role in stoichiometry and mole calculations, enabling chemists to relate the mass of a substance to the number of particles it contains. This connection is crucial for performing reactions, determining yields, and understanding the quantities of substances involved in chemical equations.

The other values provided do not align with the recognized standard for Avogadro's number and would not be used in any chemical calculations or conversions involving moles. Thus, 6.022 x 10^23 remains the correct and universally accepted value.