If a balloon has #-5 times 10^-7# #C# excess charge on it, how many electrons does it have?

1 Answer
David G.
Jun 11, 2017

We're really being asked about the number of #excess# electrons: we can't know the total number of electrons in the balloon from the information given.

The charge on an electron is #-1.6xx10^-19# #C#. Number of electrons will be given by #n = (-5xx10^-7)/(-9.1xx10^-19)=3.125xx10^9# electrons

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