How many moles of electron weight one kilogram ?

Mass  of  an  electron  = 9.108  ×  10−31  kgThus,   9.108  ×  10−31  kg  of electron contain=16.023 × 1023  moles∴   1 kg  of  electrons will  contain=  16.023 × 1023   ×  19.108 × 10−31   moles= 16.023 × 9.108   × 108 moles