30 ! which of these is a benefit of fuel cell cars? fuel cell cars are inexpensive. hydrogen fuel can be stored safely. fuel cell cars do not release greenhouse gases. hydrogen fuel can be distributed easily.

Fuel cell cars do not emit green house gases.

Explanation:

The fuel cells involve the production of electricity through the electrochemical   reaction between hydrogen and an oxidizing agent. Normally, oxygen is used.

Reaction at the anode: 2H₂ + 2O₂− → 2H₂O + 4e−

Reaction at the cathode: O₂ + 4e− → 2O²⁻

Overall Cell Reaction: 2H₂ + O₂ → 2H₂O

The only byproduct is water vapor which is easily condensed into water. This means that the cells are environmentally friendly.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

i believe that it is a exoplanet