(i) Calculate the

(i) As we know that

Mass of one electron = 9.1× 10^-28 g

1 electron weighs 9.1× 10^-28 g

So, X electrons will weigh 1 g

X = [1] / [9.1× 10^-28]

= 1.098×10²⁷ electrons

Therefore 1.098×10²⁷ electrons together weigh 1g.

(ii) By Avogadro’s Law we know that

1 mole of electron = 6.023×10²³ electrons

Mass of one electron = 9.1× 10^-28g

Therefore, Mass of 1 mole of electrons = [6.023×10²³] × [9.1× 10^-28]

= 5.4809× 10^-4g

We also know that charge of one electron = 1.6× 10^-19 C

Therefore, Charge of 1 mole of electron is = [6.023×10²³] × [1.6× 10^-19]

= 96.368×10³ C

Therefore, mass of one mole of electron is 5.481× 10^-4 g and the charge is 96.37×10³ C.