Question

Calculate the number of electrons constituting 16 coulombs of charge.

Answer 1

Charge on 1 electron= 1.6x10^-19 C 

So in 1 coulomb of charge 
1/(1.6x10^-19) = 6.25x10^18 

Multiply that with 16, and it will give you 1x10^20 electrons in 16 coulombs of charge.

Answer 2

Answer::

We know that the charge on an electron is negative and it is -1.6⨯10-19 coulomb.

We need to calculate the number of electrons constituting one coulomb of charge.

e = 1.6 × 10-19 C

Total charge required for 1Coulomb.

∴ q = 1C……….(1)

The formula to calculate the charge is

q = ne

where

q = charge

e = number of electrons

n = q/e……….(2)

Substituting equation (1) in equation (2) we get

n = 1/(1.6 × 10-19)

n = 6.25 × 1018 electrons ≅ 6 × 1018 electrons

So 1 Columb of charge contains 6 × 1018 electrons