calculate the mass and charge of one mole of electron?

You need the mass of an electron - 9.1 × 10^-31 kg. To get the mass of one mole of electrons, you need to multiply that number by 6.022*10^23, which = 5.48*10^-7 kg 

To find the charge, you also need to know the charge of one electron, and multiply it by Avogadro's number. The charge of one electron is 1.602 × 10^-19 C (coulombs). You multiply and get 9.647*10^4 C.

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