Question

How many moles of electrons weigh one kilogram?
[mass of electron = 9.108 x 10-31 kg, Avogadro Number = 6.023 x 1023​

Answer 1

Answer:

1.825×10^6

Explanation:

Mass of electron = 9.1 x 10^-31Kg

One mole of electrons = 6.023x10^23

Mass of 1 mole of electrons = 6.023x10^23 x 9.1 x 10^-31Kg

How many moles of electrons = 1kg

= 1kg x 1mole/ 6.023x10^23 x 9.1 x 10^-31Kg

= = 108/ 9.1 X 6.023 mole of electrons

or

1.825 x 10^6 moles of electrons.

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Answer 2

Answer:

1.8248× 10^6

Explanation:

mass of 1 e- × N = 1kg

N=1/mass of 1 e-

N=1/9.108 ×10^-31

N=1.098× 10^7

no. of moles = N/Na

no. of moles= 1.098 × 10^7/6.022× 10^23

no. of moles= 1.8248× 10^6