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The constant F has a simple relation to two other physical constants:
NA is the Avogadro constant (the ratio of the number of particles 'N' to the amount of substance 'n' - a unit mole), and e is the elementary charge or the magnitude of the charge of an electron. This relation is true because the amount of charge of a mole of electrons is equal to the amount of charge in one electron multiplied by the number of electrons in a mole.
The value of F was first determined by weighing the amount of silver deposited in an electrochemical reaction in which a measured current was passed for a measured time, and using Faraday's law of electrolysis. Research is continuing into more accurate ways of determining the interrelated constants F, NA, and e.
Related to Faraday's constant is the "faraday", a unit of electrical charge. It is much less common than the coulomb, but sometimes used in electrochemistry. One Faraday of charge is the magnitude of the charge of one mole of electrons, i.e. 96,485.3365(21) C.
Expressed in faradays, the Faraday constant F equals "1 faraday of charge per mole".
In The Simpsons (Season 24, "Dark Knight Court"), when Mr Burns offers to buy the Springfield Comic Book Shop and all its stock, Comic Book Guy names his price as "the speed of light expressed in dollars"; to which Mr Burns replies [to Smithers]: "just give him Faraday's Constant"-- whereupon Smithers writes a cheque in the amount of "Ninety six thousand four hundred eighty five & 34/100 dollars."
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