What is Avogadro's number approximately?

What is Avogadro's number approximately?

• A. 6.022 x 10^23
• B. 6.022 x 10^24
• C. 3.011 x 10^23
• D. 1.204 x 10^23

Answer: (A)

Avogadro's number is the amount of particles in one mole, the bridge between microscopic particles and macroscopic amounts. It is approximately 6.022 × 10^23 particles per mole, so this constant lets you count atoms or molecules by weighing them. That value is used universally because a mole contains that many discrete entities, making it possible to convert between moles and numbers of particles in calculations. The other numbers differ in either the exponent or the digits, so they don’t match the established magnitude of how many particles are in a mole. For reference, the exact value defined now is 6.02214076 × 10^23 mol^−1, but 6.022 × 10^23 is the common approximation.

Avogadro's number is the amount of particles in one mole, the bridge between microscopic particles and macroscopic amounts. It is approximately 6.022 × 10^23 particles per mole, so this constant lets you count atoms or molecules by weighing them.

That value is used universally because a mole contains that many discrete entities, making it possible to convert between moles and numbers of particles in calculations. The other numbers differ in either the exponent or the digits, so they don’t match the established magnitude of how many particles are in a mole. For reference, the exact value defined now is 6.02214076 × 10^23 mol^−1, but 6.022 × 10^23 is the common approximation.