No, fuel-cell automobiles do not use gas as a fuel. They use hydrogen gas as a fuel source, which is converted into electricity to power the vehicle.
Water is the benefit of a hydrogen fuel cell ;)
Hydrogen gas
Water and they also use gas. They use a hydrogen cell, which explains the need for water.
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water vapor
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The fuel cell hydrogen is one of the two gasses, that are created by the seperations of a water molecule H2O. A water molecule consists of H - hydrogen, and O - oxygen. A fuel cell hydrogen is the gas created by the separation of a water molecule with the help of a fuel cell.
There are no commercially available hydrogen fueled cars.
No. Hydrogen fuel cell is not a title. You would only capitalize hydrogen if it was at the beginning of a sentence, as I did with this one. Otherwise, you would say 'hydrogen fuel cell'.
A fuel cell operates on the principle of reversing the process of electolysis of water. The fuel cell recombines hydrogen and oxygen to create energy and water.