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Q.
The mass of one mole of electron is
Some Basic Concepts of Chemistry
Solution:
$\because$ Mass of one electron = $9.1 \times 10^{-31}$ kg = $9.1 \times 10^{-28}$ g
$ \because $ Mass of 1 mole of electrons, i.e., mass of $6.023 \times 10^{23}$
= $9.1 \times 10^{-28} \times 6.023 \times 10^{23}$ electron
$= 5.48 \times 10^{-4}$
= 0.00055 g
= 0.55 mg