Hi,

Let me guess that, you are asking about the number of electrons in 1 Columb of charge.

so, we use the basic formula of charge i.e.

Q = n * e, where

n = number of electrons

e = charge on one lectron = 1.6 * 10^(-19)

Now put Q= 1 C in this equation and solve it.

n = 1 / 1.6 * 10^ (-19)

Hence n = 6.25 * 10^(18)

Hope it helps.