Question

What is the total charge on a 45kg of electrons ​

Answer 1

$\textbf{HERE IS YOUR ANSWER MATE}$

$\textbf{The mass of one electron is 9.11*(10^-31) kg.}$
$\textbf{The charge on an electron is -1.6*(10^-19) C}$
$\textbf{Thus, using unitary method we can find the number of electrons in 75 kg of electrons and then calculate the total charge of the electrons}$
$\textbf{N = 75/{9.11*(10^-31)}$
$\textbf{ Total charge Q = N*e}$
$\textbf{Q = 1.317*(10^13) C }$

$\fbox{Hope it helps you}$