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. How many electrons does it take to equal the mass of a dust particle.
To find out how many electrons equal the mass of a dust particle, we need to divide the mass of the dust particle by the mass of an electron:
(7.5 x 10^-10 kg) / (9.1 x 10^-31 kg) = 8.24 x 10^20
Therefore, it would take approximately 8.24 x 10^20 electrons to equal the mass of a dust particle.