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Example: How much total charge is in one mole of electrons?
How much total charge (in coulombs) is in one mole (n=6.022∗1023 particles/mol) of electrons?
Facts
- 1 mol=6.022⋅1023 particles
- All electrons have the same charge, which is e = −1.602⋅10−19 C.
Lacking
- Total Charge
Approximations & Assumptions
- None here, we have all the information we need.
Representations
- The total charge Q can be written as the number of particles N times the charge of each particle (e, for electrons): Q=N⋅e.
Solution
The total charge Q is given by Q=N⋅e=1 mol⋅1.602∗1019 C= The number of electrons in one mole is obtained by multiplying the number of moles by Avogodro's number. N=(1mole)∗6.022∗1023 N=6.022∗1023electrons Therefore, the total charge Q is given by… Q=N∗e Q=(6.022∗1023)∗(1.602∗1019C) Q=96472.44C