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 $e=-1.6\times {10}^{-19}C$.

Q. The charge of an electron is $1.6\times {10}^{-19}$ coulombs. What will be the value of charge on ${Na}^{+}$ ion?

Q. 96500 coulombs of charge is deposited on 1 g atom of monovalent silver. The positive charge on the silver ion is equal in magnitude to that of an electron and Avogadro's number is $6\times {10}^{23}$. The electronic charge will be

Q. The area of cross section, length, and density of a piece of metal of atomic weight 60 are ${10}^{-6}{m}^2$, 1 m, and $5\times {10}^3$kgm${}^{-3}$, respectively. If every atom contributes one free electron, find the drift velocity (in mms${}^{-1}$) of electrons in the metal when a current of 16 A passes through it. Avogadro's number is $N_A=6\times {10}^{23}/$mol and charge on an electron is $e=1.6\times {10}^{-19}C$

Q. The charge in coulombs of 1 gram ion of N^3- is (the charge on an electron is 1.602 × 10 ^-19 C)
(A) 2.894 × 10 ^5 C (B) 3.894 × 10 ^5 C (C) 2.894× 10^6 C (D) none of these

Q. In the oil drop experimant, charge on electron came out to be $-1.6\times {10}^{-19}\text{C}$. From Thomson's experiment, $e/m$ value for electron calculated was $1.758820\times {10}^{11}\text{C/kg}$. Find the mass of the electron.
(Given: $e$ is the magnitude of charge on electron)