Question

The total charge in coulombs, of all the electrons in three gram mole hydrogen atom is equal to $-x\times {10}^{3}C$. Find the value of $x$.

Use avogadro number, $N_A=6\times {10}^{23}$ and charge on electron $e=-1.6\times {10}^{-19}C$.

Answer 1

total number of electrons, $N=3\times 6\times {10}^{23}$
total charge $=-1.6\times {10}^{-19}N=-2.88\times {10}^{5}C=288\times {10}^{3}C$

Hence Value of $x=288$.