A sphere has a negative charge of #6.4 xx 10^-7# coulombs. Approximately how many electrons must be removed to make the sphere neutral?

2 Answers
Gió
Mar 15, 2017

I got #4xx10^12# electrons

Explanation:

You know that one electron has a charge of #1.6xx10^-19C# so we need to remove:
#(6.4xx10^(-7))/(1.6xx10^(-19))=4xx10^12# electrons

Joe K.
Mar 15, 2017

#4*10^12#electrons

Explanation:

Since one electron has a charge of #1.6*10^-19C# we can simply take the overall charge of the sphere and divide it by the charge of a single electron to see how many electrons account for the overall charge. It would look like

#(6.4*10^-4C)/(1.6*10^-19C)#

Which would give us #4*10^12#electrons

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