(i) Calculate the number of electrons which will together weighs one gram.
(ii) Calculate the mass and charge of one mole of electrons.
The number of electrons which will weigh 1 g is 10−39.11×10−31=1.098×1027 .Mass of one mole of electrons is 9.11×10−31×6.023×1023=5.486×10−7kg.
Charge of 1 mole of electrons is 1.602×10−19×6.023×1023=9.647×104 C.