Charging a Balloon

Problem Statement

An electrically neutral balloon is rubbed with fur until it acquires a net charge of 0.60 nC. How many electrons were transferred in the process?

Solution

Each electron has a charge of $1.602\times 10^{-19}C$. Thus, the total number of electrons that were transferred is:

$$N=\frac{0.60\times 10^{-9}C}{1.602\times 10^{-19}C}=3.7\times 10^9{e}^{-}$$