(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.
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1 Answer
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(i) Mass of an electron = 9.10939×10−31 kg = 9.1 × 10-28 g
⇒ No. of electrons in 9.1 × 10-28 g = 1 electronTherefore, No. of electrons in 1 g = 1/9.1 × 10-28 = 1.098×1027
(ii) One mole of electrons = 6.022 × 1023 electrons
Mass of 1 electron = 9.1 × 10-31 kg
Mass of 6.022 × 1023 electrons = (9.1 × 10-31kg) × (6.022 × 1023) = 5.48 × 10-7 kg
Charge on one electron = 1.602 × 10-19 C
&...more
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