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Question

(i) Calculate the number of electrons which will together weighs one gram.
(ii) Calculate the mass and charge of one mole of electrons.

Solution
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The number of electrons which will weigh 1 g is 1039.11×1031=1.098×1027 .

Mass of one mole of electrons is 9.11×1031×6.023×1023=5.486×107kg.

Charge of 1 mole of electrons is 1.602×1019×6.023×1023=9.647×104 C.

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