How many electrons fit in one dust particle

Question

The mass of a dust particle is approximately 7.5x10^-10 kg and the mass of an electron is 9.1x10^-31 kg. Approximately how many electrons have the same mass as one dust particle?

Answer 1

Divide the mass of one dust particle by the mass of one electron, and that will be your answer.

 

(7.5 x 10^-10 kg) / (9.1 x 10^-31 kg) ≅ 8.24 x 10²⁰