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1. Calculate the number of electrons which will together weigh one gram. 2. Calculate the mass and charge of one mole of electrons. |
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Answer» 1. Mass of one electron = 9.11 × 10-31 kg ∴ Number of electrons in one gram = \(\frac{10^{-3} kg}{9.11\times 10^{-31}kg}\) = 1.098 x 1027 2. Mass of one electron = 9.11 × 10-31 kg ∴ Mass of 1 mole of electrons = 9.11 × 10-31kg × 6.022 × 1023 = 5.486 x 10-7 kg Charge on one electron = 1.602 × 10-19 C ∴ Charge on one mole of electrons = (1.602 × 10-19 C) × (6.022 × 1023) = 9.65 × 104 C. |
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