Question

Calculate the no of electron which will ways together 1gram

Answer 1

(i) Mass of one electron = 9.10939 × 10–31kg
Number of electrons that weigh 9.10939 × 10–31 kg = 1
Number of electrons that will weigh 1 g = (1 × 10–3 kg) = 0.1098 × 10–3 + 31 = 0.1098 × 1028 = 1.098 × 1027
(ii) Mass of one electron = 9.10939 × 10–31kg Mass of one mole of electron = (6.022 × 1023) × (9.10939 ×10–31 kg) = 5.48 × 10–7 kg
Charge on one electron = 1.6022 × 10–19coulomb
Charge on one mole of electron = (1.6022 × 10–19 C) (6.022 × 1023) = 9.65 × 104 C

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