Which number is called Avogadro's constant, named after the 19th century scientist Amedeo Avogadro?

Correct option is A

​The correct answer is (a) 6.022 × 10²³

Explanation:

The number 6.022 × 10²³ is called Avogadro's constant (or Avogadro's number), and it represents the number of atoms, molecules, or particles in one mole of a substance.

• Amedeo Avogadro, an Italian scientist in the 19th century, proposed that equal volumes of gases, at the same temperature and pressure, contain the same number of molecules.
• This number became known as Avogadro's number, which is used in chemistry to express amounts of substances in terms of atoms or molecules.
• Avogadro's constant is a fundamental concept in chemistry and is used to convert between the number of particles and the number of moles.

Information Booster:

Avogadro's Constant in Practical Use:

• One mole of any substance contains 6.022 × 10²³ units of that substance (atoms, molecules, ions, etc.).
• It is used to calculate the amount of substance in chemical reactions and to understand atomic and molecular scales.

Examples:

• 1 mole of water (H₂O) contains 6.022 × 10²³ molecules of water.
• 1 mole of carbon atoms contains 6.022 × 10²³ carbon atoms.