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Name: Louise
Status: student
Age: 16
Location: N/A
Country: N/A
Date: 2000-2001


Question:
How do you calculate the number of electrons in one coulomb?


Replies:
It's not a number you can calculate, really, it's just a fundamental number that needs to be measured, like the number of molecules in a mole, the gravitational constant, Planck's constant, the speed of light, and so forth.

That said, the information in number of electrons in one coulomb can be expressed in different ways. One common way is the electric charge of an electron. This is -1.60219 x 10^-19 Coulombs/electron. So the reciprocal of this gives you electrons/Coulomb.

Richard E. Barrans Jr., Ph.D.
Assistant Director
PG Research Foundation, Darien, Illinois


The number of electrons in one coulomb is just the reciprocal of the charge on a single electron, which is:

1.6021892*10^-19 (coulombs/electron). 1/ 1.6021892*10^-19 = 6.41418*10^18 (electrons/coulomb). This is approximately 1*10^-5 mols of electrons.



V. Calder



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