Respostas

2014-03-10T20:47:42-03:00
Resposta

n = 4,0 x 10¹²
e = 
1,6 x 10⁻¹⁹C

Q = n.e
Q = 
4,0 x 10¹².1,6.10⁻¹⁹
Q = 6,4.10⁻⁷C