Answer: The chemical equations are written below.
Step-by-step explanation:
For a: Methane reacts with oxygen gas to produce carbon dioxide and water.
Combustion reaction is defined as the reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water
The chemical equation for the combustion of methane follows:
![CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)](https://img.qammunity.org/2020/formulas/chemistry/college/c95smvmeqfz6ofnqhcvlf3pfojv1ffbk3x.png)
- For b: Butane reacts with oxygen gas to produce carbon dioxide and water.
This is also an example of combustion reaction.
The chemical equation for the combustion of butane follows:
![2C_4H_(10)(g)+13O_2(g)\rightarrow 8CO_2(g)+10H_2O(g)](https://img.qammunity.org/2020/formulas/chemistry/college/9ap73ekttmrgxpha5old5vijaycsaes9w3.png)
- For c: An aqueous solution of sulfuric acid reacts with aqueous potassium hydroxide to produce potassium sulfate and water.
When an acid reacts with a base, it leads to the formation of salt and water. This reaction is known as neutralization reaction
The chemical equation for the reaction of potassium hydroxide and sulfuric acid follows:
![H_2SO_4+2KOH\rightarrow K_2SO_4+2H_2O](https://img.qammunity.org/2020/formulas/chemistry/college/tvt6e1ha1vmw1y5szy0p5b0i238s829hjw.png)
Hence, the chemical equations are written above.