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Calculate the mass of one mole of electr...

Calculate the mass of one mole of electrons? 

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Mass of one electron `=9.1095 xx10^(-31)`g
Mass of one mole electrons = Mass of electrons x Av. Number `=9.1095xx10^(-31)xx6.022xx10&(-23)`
`5.5 xx10^(-7)` kg
Mole of electrons has 0.55 mg mass
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