Respostas

2013-09-16T18:59:09-03:00
-32uC = -32*10^-6C

Q = n*e
32*10^-6 = n * 1,6*10^-19

n = 32 * 10^13/1,6

n = 20 * 10^13

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n = 2 * 10^14 elétrons em excesso
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