For 10 points, name this constant, 6.02 x 1023 molecules, named after an Italian chemist.
The unit cell volume of a single silicon crystal figures into a popular calculation to determine the value of this constant. This constant was originally discovered by Johann Loschmidt, who, for his efforts, names the number density of particles instead. This constant's namesake also proposed (*) a law stating that the number of molecules in an ideal gas depends on the volume of the gas. This constant once figured into the equivalent of 32 grams of oxygen, which is one mole. For 10 points, name this constant, 6.02 x 1023 molecules, named after an Italian chemist.
The unit cell volume of a single silicon crystal figures into a popular calculation to determine the value of this constant.
{Avogadro's} number