Question

how many electrons are there in 2kg​

Answer 1

Answer:

Multiply by Avogadro's number, 6.022140857 × 10^23. You get 6.022 x 10^26 atoms of hydrogen in a kilogram. Then you multiply by 1,836 because there are that many more times the number of electrons in a kilogram (you won't be able to confine them though!) — so you have 1.10566 x 10^30 electrons in a kilogram of them.

Answer 2

Mass of electron = 2 kg

 

Mass of electron = 9.1 ×10-31 kg

 

1 mole of electrons = 6.022×1023  

 

Mass of 1 mole of electrons = 9.1 ×10-31 × 6.022×1023  

 

No. of moles in 2 kg of electrons = 2/ (9.1 ×10-31 × 6.022×1023)

 

                                               = 3.649×10-6 mol