A conductor has a net charge of +24 uC. How many electrons are needed to make this conductor neutral

The charge on the conductor is +24 μC,  since the charge is positive, same amount of charge but it will be negative.That is - 24 μC.To know the number of electrons, we know that the charge of an  electron = -1.6 * 10^-19 C.=    - 24 μC / (-1.6 * 10^-19 C)=  (-24 * 10^-6) / (-1.6 * 10^-19 C)      Use your calculator=  15 * 10^13=  1.5 * 10 ^14  Electrons.