question_answer 52)

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

Answer:

  Sodium atom loses an electron to form sodium ion, For 100 moles of each sodium atom and sodium ion there would be difference of  Mass of 100 moles of electron = 5.48002 g Mass of 1 mole of electron  6.022 x 1023 electrons are present in 1 mole of electron [as 1 mole =6.022 x 1023 electrons] i.e, mass of 6.022 x1023 electrons = 5.48002/100 g            Mass of 1 electron