There are 6.02E23 electrons in 1 mole of electrons, so
550 kJ/mol e x (1 mol e/6.02E23 e) = ? kJ/1 electron. Note the units are kJ/e.
It takes 550 kJ to remove one mole of electrons from the atoms at the surface of a solid metal.
How much energy does it take to remove a single electron from an atom at the surface of this solid metal?
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