# Question #076ef

##### 1 Answer

May 5, 2016

Just over 1.8 million moles.

#### Explanation:

An electron has a rest mass of 9.109 x 10^-31 kg.

Therefore 1 kg of electrons contains (1 / 9.109 x 10^-31) = 1.0978 x 10^30 electrons.

A mole of electrons is 6.02 x 10^23 electrons, so a kg of electrons contains 1.0978 x 10^30 / 6.02 x 10^23 = 1,823,600 moles.