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. Which expression would you use to find out how many electrons you need to equal the mass of one dust particle?(1 point)
Responses
(9.1×10−31)(7.5×10−10)
open paren 9 point 1 times 10 to the negative 31 power close paren times open paren 7 point 5 times 10 to the negative 10 power close paren
(7.5×10−10)÷(9.1×10−31)
open paren 7 point 5 times 10 to the negative 10 power close paren divided by open paren 9 point 1 times 10 to the negative 31 power close paren
(9.1×10−31)÷(7.5×10−10)
open paren 9 point 1 times 10 to the negative 31 power close paren divided by open paren 7 point 5 times 10 to the negative 10 power close paren
(7.5×10−10)(9.1×10−31)
open paren 7 point 5 times 10 to the negative 10 power close paren times open paren 9 point 1 times 10 to the negative 31 power close paren
(9.1×10−31)−(7.5×10−10)
(7.5×10^-10)÷(9.1×10^-31)
open paren 7.5 times 10 to the negative 10 power close paren divided by open paren 9.1 times 10 to the negative 31 power.
This expression represents dividing the mass of one dust particle by the mass of an electron, which will give the number of electrons needed to equal the mass of one dust particle.