Question #e4a84

1 Answer
Apr 25, 2017

Answer:

(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)#