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How many moles of electrons will weigh o...

How many moles of electrons will weigh one kilogram?

A

`6.023 xx 10^(23)`

B

`1/(9.108) xx 10^(21)`

C

`(6.023)/(9.108) xx 10^(54)`

D

`1/(9.108 xx 6.023) xx 10^(8)`

Text Solution

Verified by Experts

The correct Answer is:
D
Mass of an electron `=9.108 xx 10^(-31)` kg
Mass of one mole of electron `=9.108 xx 10^(-31) xx 6.023 xx 10^(23) = 9.108 xx 6.023 xx 10^(-8)`
`therefore` In 1 kg, no. of moles of electrons.
`=1/(9.108 xx 6.023 xx 10^(-8)) =10^(8)/(9.108 xx 6.023)`
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