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[" Exomple "1.3" A sphere of lead of mas...

[" Exomple "1.3" A sphere of lead of mass "10g" has net "],[" charge "-2.5times10^(-9)C" ."],[" (i) Find the number of excess electrons on the sphere."],[" (i) How many excess electrons are per lead atom? Atomic "],[" number of lead is "82" and its atomic mass is "207g/mol" ."]

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