What is Avogadro's number?

Avogadro's number is a fundamental constant in chemistry that represents the number of particles, typically atoms or molecules, in one mole of a substance. The value of Avogadro's number is precisely 6.022 × 10²³. This number is crucial for converting between moles and the number of individual particles, allowing chemists to quantify the amount of material accurately when performing calculations related to chemical reactions and stoichiometry.

Understanding Avogadro's number is essential in various applications, such as calculating the number of atoms in a given mass of an element or the number of molecules in a certain volume of gas at standard temperature and pressure. The choice that correctly states Avogadro's number provides the foundation for a significant number of calculations in both theoretical and practical chemistry contexts, enabling a deeper comprehension of chemical relationships and constants.