What is Avogadro's number?

Explore WJEC Chemistry Exam preparation. Study with quizzes and flashcards. Master key concepts easily!

Avogadro's number is defined as the number of constituent particles, typically atoms or molecules, in one mole of a substance. It is a fundamental constant in chemistry that allows chemists to convert between the number of particles and the amount of substance measured in moles. The value of Avogadro's number is precisely 6.022 × 10²³ per mole. This number is crucial for stoichiometric calculations in chemical reactions, helping to relate macroscopic quantities of materials to the microscopic scale of atoms and molecules.

The other options presented consist of various scientific constants that are not related to the number of particles in a mole. For instance, one of the numbers refers to the charge of a proton, while another represents the mass of an electron, neither of which is relevant to Avogadro's number. Thus, understanding the significance of 6.022 × 10²³ is key in using and applying this concept effectively in chemistry.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy