What constant equals the number of particles in a mole, approximately 6 x 10^23?

What constant equals the number of particles in a mole, approximately 6 x 10^23?

• A. Planck's constant
• B. Boltzmann constant
• C. Gas constant
• D. Avogadro's constant (mole)

Answer: (D)

How many particles are in a mole? Avogadro's constant provides that count: about 6 x 10^23 particles per mole. This constant is the bridge between the microscopic world of atoms and the macroscopic world we measure in moles, grams, and liters. It lets you convert between the number of atoms or molecules and the amount of substance in moles. So the answer points to Avogadro's constant (the mole). For context, Planck's constant relates energy to frequency of light, Boltzmann constant links temperature to energy at the particle level, and the gas constant appears in the ideal gas law and equals Avogadro's constant times Boltzmann's constant.

How many particles are in a mole? Avogadro's constant provides that count: about 6 x 10^23 particles per mole. This constant is the bridge between the microscopic world of atoms and the macroscopic world we measure in moles, grams, and liters. It lets you convert between the number of atoms or molecules and the amount of substance in moles. So the answer points to Avogadro's constant (the mole).

For context, Planck's constant relates energy to frequency of light, Boltzmann constant links temperature to energy at the particle level, and the gas constant appears in the ideal gas law and equals Avogadro's constant times Boltzmann's constant.