The difference between 100 moles of sodium and sodium ions is 5.48002g. Calculate the mass of an electron.
Sodium loses an electron to form sodium ions.
Na → Na+ + e−
Sodium atom loses an electron to form sodium ion.
1 mole of Sodium atom has the difference of 1 electron.
So, 100 moles of Sodium atoms will have the difference of 100 electrons.
For 100 moles of each sodium atom and sodium ion, there would be a difference of 100 moles of electrons.
One mole of electrons has 6.023×1023e−
Given that,Mass of 100 moles of electron = 5.48002g
Mass of 1 mole of electron = (5.48002/100)g
Mass of 1 electron = 5.48002/(100×6.023×1023e− ) = 9.1×10−28g or 9.1×10−31kg