Question

Mass of 1 mole of electron in mg​

Answer 1

1 electron has mass of =9.1×10 to the power - 31 kg

1 mole has 6.023×10 to the power 23 particles  

So 1 mole of electron has mass 9.1×10 to the power - 31 ×6.023×10 to the power 23 =5.481 ×10 to the power - 7 kg