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6) In a sphere of lead of 4.0 grams of mass, surplus electrons are placed so...

6) In a sphere of lead of 4.0 grams of mass, surplus electrons are placed so that its net electric charge is -0.50 x10-9 C. a) Find the number of surplus electrons in 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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Answer #1

Concept: here we use charge quantization and molar concept for solution ,

001932 mole 207 ghmol So excess elechons pen atoN 1.164 x1022 -13 excess Per atow

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