Fuel cells a. need regular recharging b. cannot be used to power cars c. create electrons d. need continuous supplies of reactants
answer: d. need continuous supplies of reactants Fuel cells are different than batteries. Fuel cells aren't recharged. They convert gases into electricity and do so at a membrane interface. They can be used to power cars since they can run off of air as an oxidizer and hydrogen gas as a fuel to be converted to electricity. It does not create electrons , it simply gathers the electrons from the chemical reaction of the fuel and the oxidizer and makes them do work. So D is the only correct answer. If you shut off the air or the hydrogen, the fuel cell stops producing electricity immediately.
They can be used to power cars.
