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Home » (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons.
(i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons.
CBSE | Chemistry | Class 11 | NCERT | Structure of Atom
(i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons.

1 electron weighs 9.109*10-31 kg.

Therefore, number of electrons that weigh 1 g (10-3 kg) = 1.098*1027 electrons

(ii)

Mass of one mole of electrons = NA* mass of one electron

= (6.022*1023)*(9.109*10-31 kg) = 5.48*10-7 kg

Charge on one mole of electrons = NA* charge of one electron

= (6.022*1023)*(1.6022*10-19 C) = 9.65*104 C

i

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