One day, cars may run on fuel cells. fuel cells obtain energy from the synthesis of gaseous water from hydrogen and oxygen. if all cars switched from burning fossil fuels to fuel cells, which might you expect to also occur? a. an increase in the price of gasoline b. an increase in carbon dioxide emissions c. an increase in the number of gas stations d. an increase in the water vapor content of earth's atmosphere

d.an increase in the water vapor content of earth's atmosphere

Explanation:

Fossil fuels are fuels formed in the earth from plant or animal remains. It is mostly composed of coal, natural gas and petroleum. Combustion of fossil fuels also produces pollutants such as carbon dioxide, nitrogen dioxide and others.

Fuel cells are electrochemical cells that converts the chemical energy of a fuel and an oxidizing agent into electricity by use of redox reactions. They mostly involve use of hydrogen and oxygen which forms water as a bye product.

Thus if all cars switched from burning fossil fuels to fuel cells, an increase in the water vapor content of earth's atmosphere.

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .