what is the charge in 75 Kg of electrons
Mass of 1 e-(m) = 9.11*10^-31 kg
charge on 1 e- = -1.6*10^-19 c
total mass (M) = 75 kg
so, total charge (Q) = M*q/m
= - 75*1.6*10^-19/9.11*10^-31
=-1.32*10^13 C