calculate mass and charge of one mole of electron
Answers
Answer:
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Explanation
We know that : 1 mole= 6.02 x 10^23
Mass of one electron = 9.1 x 10^31 kg
Mass of one mole of electron = 9.1 x 10^31 x 6.02 x 10^23
= 5.4 x 10^-7 kg
We know that : charge on electron = 1.6 x 10^-19 Coulombs
Charge on one mole of electron = 1.6 x 10^-19 x 6.02 x 10^23
= 9.65 x 10^4 Coulombs
Answer:
(i) Mass of one electron = 9.10939 × 10–31 kg
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 × 1031 x 10 -3
= 0.1098 × 1028
= 1.098 × 1027
(ii) Mass of one electron = 9.10939 × 10–31 kg
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 × 10–19 coulomb
Charge on one mole of electron = (1.6022 × 10–19 C) X (6.022 × 1023) = 9.65 × 104 C