Question

what is the mass of electron with a charge of 1.0C

Answer 1

Explanations & Calculations

• The mass of a single electron is $\small 9.109\times10^{-31}kg$
• The charge of a single electron is $\small 1.602\times10^{-19}C$

• Then, the number of electrons that bare 1C of charge is

$\qquad\qquad \begin{aligned} &=\small \frac{1C}{1.602\times10^{-19}C\,/electron}\\ &=\small \frac{10^{19}}{1.602}electrons \end {aligned}$

• Therefore, the total mass will be

$\qquad\qquad \begin{aligned} \small M&=\small \frac{10^{19}}{1.602}electrons\times9.109\times10^{-31}kg/electron\\ &=\small \bold{5.686\times10^{-22}kg} \end {aligned}$