The mass of a dust particle is approximately 7.5 * 10 ^ - 10 kilograms and the mass of an electron is 9.1 * 10 ^ - 31 kilograms. How many electrons does it take to equal the mass of a dust particle? (1 point)
To find out how many electrons it would take to equal the mass of a dust particle, we need to divide the mass of the dust particle by the mass of an electron.
Mass of dust particle = 7.5 * 10 ^ -10 kg
Mass of electron = 9.1 * 10 ^ -31 kg
Number of electrons = Mass of dust particle / Mass of an electron
Number of electrons = (7.5 * 10 ^ -10) / (9.1 * 10 ^ -31)
Number of electrons = 7.5 / 9.1 * 10 ^ (-10 - (-31))
Number of electrons = 7.5 / 9.1 * 10 ^ 21
Number of electrons ≈ 0.824 * 10 ^ 21
Therefore, it would take approximately 8.24 * 10 ^ 20 electrons to equal the mass of a dust particle.