Question

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

Group of answer choices

1.21×1021

8.24×1021

1.21×1020

8.24×1020

Answer 1

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

Explanation:

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