Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions. (Mass of an electron = 9.1×10-31 kg)
A Mg2+ ion and Mg atom differ by two electrons.
103 moles of Mg2+ and Mg atoms would differ by
103×2 moles of electrons
Mass of 2×103 moles of electrons = 2 x 103 x 6.023 x 1023 x 9.1 x 10 -31 kg
1.096 x 10-3 Kg
