1) excess electrons are placed on a small lead sphere with mass 8.00g so that it

Question

1) excess electrons are placed on a small lead sphere with mass 8.00g so that its net charge is -3.20x10^-9 C. Find the number of excess electrons on the sphere!?
A) How many excess electrons are there per lead atom!? The atomic number of lead is 82 and its atomic mass is 207 g/mol. 1) excess electrons are placed on a small lead sphere with mass 8.00g so that its net charge is -3.20x10^-9 C. Find the number of excess electrons on the sphere!?
A) How many excess electrons are there per lead atom!? The atomic number of lead is 82 and its atomic mass is 207 g/mol.
A) How many excess electrons are there per lead atom!? The atomic number of lead is 82 and its atomic mass is 207 g/mol.

Explanation / Answer

the number of excess electrons on the sphere

= -3.20 x 10^-9 / -1.6x10^-19 = 2.00x10^10 electrons

now, n = 8.00x10^-3 kg/ 207x10^-3 kg/mol = 0.03865 mol

and electrons are there per lead atom = 0.03865x6.023x10^23 = 2.32x10^22 numbers

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