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(i) Calculate the number of electrons which will together weight one gram. (ii) Calculate the mass and charge of one mole of electrons |
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Answer» SOLUTION :(i) Mass of one electron `= 9.11 xx 10^(-31) kg, " i.e., " 9.11 xx 10^(-31) kg = 1` electron `:. 1 g " i.e., " 10^(-3) kg = (1)/(9.11 xx 10^(-31)) xx 10^(-13)` ELECTRONS = `1.098 xx 10^(27)` electrons (ii) Mass of one electron `= 9.11 xx 10^(-31) kg` `:.` Mass of one MOLE of electrons `= (9.11 xx 10^(-31)) xx (6.022 xx 10^(23)) = 5.486 xx 10^(-7) kg` Charge on one electron `= 1.602 X 10^(-19)` coulomb `:.` Charge on one mole of electrons `= (1.602 xx 10^(-19)) xx (6.022 xx 10^(23)) = 9.65 xx 10^(4)` coulombs |
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