How did avogadro calculated his number? - Answers

Amedeo Avogadro did not directly calculate Avogadro's number, but he contributed to the concept of the mole and the relationship between gas volumes and the number of molecules. He proposed that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules, known as Avogadro's law. This idea laid the groundwork for later scientists, like Jean Perrin, who experimentally determined Avogadro's number by using methods such as Brownian motion in suspensions to relate molecular sizes to macroscopic quantities. Ultimately, Avogadro's number, approximately (6.022 \times 10^{23}), quantifies the number of atoms, ions, or molecules in one mole of a substance.