The average mass of an automobile in the United States is about . The mass of a mosquito is 10 mg. The mass of an electron is Use order-of-magnitude calculations to estimate how many times more massive both a mosquito and an automobile are when compared to an electron.
It's not possible to make any comparisons among those three objects, since you've neglected to mention the masses of two of them. Several of the possible calculations would lead to mathematical nightmares, involving divisions by zero.
