Question

Question #e4a84

Answer 1

(a) `" "2.31 xx 10^10`

(b) `" "3.25 xx 10^12`

Explanation:

Electrons are fundamental charges and each electron has a charge of `-1.60*10^(-19)C`.

In each case, divide the charge required by this value and you will get the number of electrons needed.

(a) `(-3.70*10^(-9)) / (-1.6*10^(-19)) = 2.31*10^(10)`

(b) `(0.520*10^(-6)) / (-1.6*10^(-19)) = 3.25*10^(12)`