The mass of an electron is 9.11 10-28 g. What is the mass of a mole of electrons?

Question

The mass of an electron is 9.11  10^-28 g. What is the mass of a mole of electrons? 

Answer 1

If the mass of one electron is 9.11 x 10^-28 g, and you are looking for the mass of a mole of electrons, you need to understand Avogadro's number. One mole is 6.02 x 10²³ particles. So you will have to multiply (6.02 x 10²³) x (9.11 x 10^-28 g) to get your answer of 5.48 x 10^-4 grams (answer rounded to significant figures)