Avogadro's Number Quiz

Who was the first person to estimate the actual number of particles in a given amount of a substance?

• Jean Baptiste Perrin

• Josef Loschmidt

• Robert Millikan

• Amadeo Avogadro

What is the accepted value of the Loschmidt constant?

• 1.60217653 x 10^-19 coulombs per electron

• 2.6867773 x 10^25 m-3

• 6.02214154 x 10^23 particles per mole

• 96,485.3383 coulombs per mole of electrons

Who reported an estimate of Avogadro’s number based on his work on Brownian motion?

• Amadeo Avogadro

• Josef Loschmidt

• Jean Baptiste Perrin

• Robert Millikan

What is the best estimate of the charge on an electron based on modern experiments?

• 2.6867773 x 10^25 m-3

• 6.02214154 x 10^23 particles per mole

• 1.60217653 x 10^-19 coulombs per electron

• 96,485.3383 coulombs per mole of electrons

How did American physicist Robert Millikan determine Avogadro’s number?

• By measuring the density of an ultrapure sample of a material on the macroscopic scale

• By using x-ray diffraction techniques to determine the number of atoms per unit cell in the crystal

• By measuring the charge on an electron

• By estimating the number of particles in one cubic centimeter of gas at standard conditions

What is the best estimate of the value of a Faraday according to the National Institute of Standards and Technology (NIST)?

• 1.60217653 x 10^-19 coulombs per electron

• 96,485.3383 coulombs per mole of electrons

• 6.02214154 x 10^23 particles per mole

• 2.6867773 x 10^25 m-3

What is another approach to determining Avogadro’s number?

• By measuring the charge on an electron

• By estimating the number of particles in one cubic centimeter of gas at standard conditions

• By using x-ray diffraction techniques to determine the number of atoms per unit cell in the crystal

• By measuring the density of an ultrapure sample of a material on the macroscopic scale

What is the term used for the number of particles in a unit known as a mole?

• Brownian motion

• Faraday

• Loschmidt constant

• Avogadro's number