Answer
$3.125 \times 10^{19}$ electrons cross each second
Work Step by Step
Total charge crossing in one second = current $\times$ 1 = 5 C
No. of electrons crossing per second = $\frac{total charge crossing per second}{charge of each electron}$ = $\frac{5}{1.6 \times 10^{-19}}$
= $3.125 \times 10^{19}$