Avogadro's number in physics

Avogadro's number, approximately \(6.022 \times 10^{23}\), is a fundamental constant in chemistry and physics that defines the number of atoms, molecules, or other particles in one mole of a substance. This value allows scientists to convert between the mass of a substance and the number of particles it contains, facilitating calculations in chemical reactions. Essentially, it serves as a bridge between the macroscopic world we observe and the microscopic world of atoms, helping us understand how substances interact and how matter is quantified in measurable amounts.