Question

A lightning bolt transfers 22.0 C to the earth. How many electrons are transferred?

Answer 1

One electron carries the charge of

$$e = 1.6\times 10^{-19}C$$

Thus, there are

$$N = \dfrac{Q}{e}$$

electrons in the charge of $Q = 22C$. Substituting the values, obtain:

$$N = \dfrac{22C}{1.6\times 10^{-19}C} = 1.375\times 10^{20}$$

Answer. $1.375\times 10^{20}$ electrons.