The difference in the mass of 100 moles of each of sodium atoms and sodium ions is `5.48002` g. Compute the mass of an electron.

Explanation

Sodium atom ioses an electron to form sodium ion,
`underset("Sodium atom")(Na) to underset("Sodium ion")(Na^(+))+ underset("electron")(e^(-))`
For 100 moles of each sodium atom and sodium ion there would be difference of `100e^(-)`
`therefore` Mass of 100 moles of electron =(5.48002)g
`therefore` Mass of 1 mole of electron `=(5.48002)/(100)`g
`therefore 6.022 xx 10^(23)` electrons are present in 1 mole of electron (as 1 mole =`6.022 xx 10^(23)` electrons)
I.e., masss of `6.022 xx 10^(23)` electrons `=5.48002/100`g
`therefore` Mass of 1 electron `=(5.48002)/(100 xx 6.022 xx 10^(23)) = 9.1 xx 10^(-26)g`