Scientists have discovered how to use electricity to power cars. running cars on electricity could
a) conserve gasoline.
b) the big oil companies.
c) pollute the atmosphere.
d) use up mineral resources.

A) conserve gasoline.

Fueling the cars with electricity offers some benefits over conventional fueling  cars, these vehicles react quickly, these can be charged easily and efficiency of the vehicle increases. Most importantly this initiative  can help in the conservation of the fuels like coal, natural gas and gasoline which are non-renewable sources of energy. All these energy resources utilized by the cars or any other transportation vehicle releases toxic chemical gases which are responsible for pollution. The running cars on electricity is likely to produce less pollution than conventionally fueled cars.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

the answer to this question is 3.