Jean Perrin estimated this value by measuring the rate of decrease of mastic particles placed at different heights in water. The gas constant divided by this value equals the Boltzmann constant, and the elementary charge times this value equals the Faraday constant. The namesake of this value developed a law that states the volume of a gas is proportional to the number of 
Jean Perrin estimated this value by measuring the rate of decrease of mastic particles placed at different heights in water. The gas constant divided by this value equals the Boltzmann constant, and the elementary charge times this value equals the Faraday constant. The namesake of this value developed a law that states the volume of a gas is proportional to the number of moles of gas present. For 10 points, name this eponymous value that is defined as the number of atoms or molecules in one mole of a substance, and is equal to 6.02 times 10 to the 23rd power.
Jean Perrin estimated this value by measuring the rate of decrease of mastic particles placed at different heights in water.
Avogadro's number or constant