Question

Find the total electric charge of 2.3 kg of electrons.

Express your answer using two significant figures.

Answer 1

$\\total\;mass\;of\;electrons\;M=nm\\\\ m=mass\;of\;each\;eleectron=9.1\times 10^{-31}kg\\\\ n=number\;of\;electrons=\frac{M}{m}\\\\ e=charge\;of\;electron\\\\ total\;charge\;Q=ne=\frac{M}{m}e=\frac{2.3}{9.1\times 10^{-31}}\times 1.6\times 10^{-19}\;C\\\\Q=4.0\times 10^{11}\;C$