Question

how many moles of electron having one kilogram weight

Answer 1

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A mole or gram molecular weight of a chemical is the total atomic weight of 6.023 x 10^23 atoms of the chemical. An electron is not an atom hence it does not have a gram molecular weight . has only four significant figures, the answer has four significant figures.) 1.8x10^6 moles of electrons weigh 1 kg.

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Answer 2

The mass of an electron is 9.1 * 10^-31 kg

Therefore number of electrons in 1kg = 1/(9.1 * 10^-31) electrons = 1.09 * 10^30 electron

Number of particles in 1 mole =6.023 * 10^23 (Avagadro’s constant)

So ,

Number of moles = number of electrons/ Avagadro’s constant = (1.09 * 10^30)/(6.023 * 10^23) = 1.8 * 10^6 electrons




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