how many coulombs of charge do 50 * 10^31 electrons possess

Quantity of Charge , Q = neWhere n = number of electrons             e = charge on one electron = -1.6 * 10 ^-19  C.             n = 50 * 10^31  electronsQ =    (50 * 10^31)*( -1.6 * 10 ^-19 ) =  -8 * 10^13 C.Note that the minus sign indicates that the charge is a negative charge.