how many moles of electrons will weight one kilogram-

Options

A. `6.022xx10^(23)`
B. `(1)/(9.108)xx10^(31)`
C. `(6.023)/(9.108)xx10^(5)`
D. `(1)/(9.108xx6.023)xx10^(8)`

Answer

D

Explanation

Mass of 1 mol of electron=`9.108xx10^(-31)xx6.023xx10^(23)kg`
No. of mole present in 1 kg of electron
`=(1)/(9.108xx6.023xx10^(-8))=(1)/(9.108xx6.023)xx10^(8)`