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. Which expression would you use to find out how many electrons you need to equal the mass of one dust particle? (1 point)
(9.1 x 10-31) (7.5 x 10-10)
(7.5 x 10-10)
(9.1 × 10-31)
(9.1 x 10-31)
(7.5 × 10-10)
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(7.5 x 10-10) (9.1 × 10-31)
(9.1 x 10-31)
(7.5 × 10-10)
To find out how many electrons you need to equal the mass of one dust particle, you would multiply the mass of the dust particle by the inverse of the mass of an electron:
(7.5 x 10^-10) / (9.1 x 10^-31)