1.

How many moles electron weigh one kilogram

Answer»

`6.023xx10^(23)`
`1/9.108xx10^(31)`
`6.023/9.108xx10^(54)`
`1/(9.108xx6.023) xx10^(8)`

Solution :1 MOLE of electron WEIGHT `9.108 xx 10^(-31) xx 6.023 xx 10^(23)kg`
So number of moles of electron in 1 kg is `(1)/(9.108 xx 10^(-31) xx 6.023 xx 10^(23)) = (1)/(9.108xx 6.023) xx10^(8)`


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