Question

Express 16 mg mass into equivalent energy in electron volts?

Answer 1

We know that,
$$\begin{gathered} \mathrm{The}\mathrm{mass}\mathrm{equivalent}\mathrm{of}1\mathrm{eV}\mathrm{is}1.783\times {10}^{-36}\mathrm{kg}. \\ \mathrm{Thus}, \\ 1.783\times {10}^{-36}\mathrm{kg}=1\mathrm{eV} \\ \mathrm{or}1.783\times {10}^{-36}\times {10}^6\mathrm{mg}=1\mathrm{eV} \\ \mathrm{or}1\mathrm{mg}=\frac{1}{1.783\times {10}^{-30}}\mathrm{eV} \\ \mathrm{or}16\mathrm{mg}=\frac{16}{1.783\times {10}^{-30}}\mathrm{eV}=8.97\times {10}^{30}\mathrm{eV} \end{gathered}$$