Calculate the number of electrons constituting one coulomb of charge .
( With steps and on paper ) 

Dear student,

We know that charge of an electron, e=1.6 x 10^-19C

No. of electrons is given by,
$$\begin{gathered} n=\frac{Q}{e} \\ \Rightarrow \\ n=\frac{1}{1.6\times {10}^{-19}}=0.625\times {10}^{19} \\ \Rightarrow \\ n=6.25\times {10}^{18} \end{gathered}$$