Ocean acidification is the result of cars releasing
a. acid directly into the atmosphere
b. carbon dioxide that forms acid when it dissolves in water
c. sulphur dioxide that forms acid in the atmosphere
d. nitrogen oxides that form acid in the atmosphere

Answer is: b. carbon dioxide that forms acid when it dissolves in water.

Gasoline is a mixture of many different hydrocarbons: alkanes (paraffins), cycloalkanes and alkenes (olefins).

Reactio of gasoline combustion and forming carbon dioxide:

C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O.

Balanced chemical reaction of forming carbonic acid from carbon dioxide and water in the clouds: CO₂ + H₂O → H₂CO₃.

Fossil fuel combustion increases the acidity of rain.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-