Respostas

2014-02-23T17:31:46-03:00
Resposta

Q = 64.10C
e = 1,6.10⁻¹⁹

Q = n.e
640 = 1,6.10⁻¹⁹n
n = 640/1,6.10⁻¹⁹
n = 400.10¹⁹
n = 4.10²¹ eletrons
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