How many electrons does a car have?

Answer 1

It depends on the mass of the car and what materials it's made of.

If you're just looking for a ballpark figure...

Let's assume a smallish car with a curb weight of around 1 long ton (about 2200 pounds, or around 1000 kg). Let's further assume that it's made entirely of aluminum (not realistic, but I did say ballpark figure).

That works out to about 37,000 moles of aluminum, and each aluminum atom contains 13 electrons, for a grand total of 481,000 moles of electrons.

That gives us just slightly under 2.9 x 1029 electrons.