Answer:
[tex]7.2\times 10^{-18}C[/tex]
Explanation:
-Let x be the charge of 45 electrons
-An electron has a relatively law mas.
-Using the law of proportions, the charge value of 45 electrons is calculated as:
[tex]1e=1.6 \times 10^{-19} coulomb\\45e=x\\\\x=\frac{45\times1.6 \times 10^{-19} coulomb}{1e}\\\\x=7.2\times 10^{-18}C[/tex]
Hence, the electron charge of 45 electrons is [tex]7.2\times 10^{-18}C[/tex]
