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Coulomb’s Law: Excess electrons are placed on a small lead sphere with a mass of 8.00 g so that its net charge is -3.20 × 10⁻⁹ C..
[a] Find the number of excess electrons on the sphere.
[b] How many excess electrons are there per lead atom? The atomic number of lead is 82, and its atomic mass is 207 g/mol.
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