What is Avogadro's number?

Avogadro's number is defined as the number of constituent particles (usually atoms or molecules) that are contained in one mole of a substance, and it is a fundamental constant in chemistry. The correct value of Avogadro's number is approximately 6.022 x 10^23 particles per mole. This value allows chemists to convert between the mass of a substance and the number of particles it contains, facilitating calculations in stoichiometry and reactions.

In chemistry, the importance of Avogadro's number cannot be understated, as it serves as a bridge between the atomic scale and the macroscopic scale we observe in laboratory settings. Thus, recognizing and using 6.022 x 10^23 as Avogadro's number is essential for proper calculations in chemical equations and when measuring quantities of substances. This is why the choice indicating that value is correct, as it reflects the established scientific consensus around this fundamental concept in chemistry.