Answer : The missing coefficient in the balanced equation is, 1 and this is a type of combustion reaction.
Explanation :
Law of conservation of matter : It states that the number of atoms of each element present of the reactant side must be equal to the product side.
The given chemical reaction is,
![1C_3H_8+5O_2\rightarrow 3CO_2+4H_2O](https://img.qammunity.org/2019/formulas/chemistry/high-school/iv9futaaljcpplr73wdtm4s1r7zz3ei8wx.png)
The given chemical reaction is balanced.
By the stoichiometry we can say that, 1 moles of propane react with 5 moles of oxygen to give 3 moles of carbon dioxide and 4 moles of water.
The given reaction is a combustion reaction.
Combustion reaction : it is a reaction in which the a hydrocarbon react with the oxygen to give carbon dioxide and water as a product.
Hence, the missing coefficient in the balanced equation is, 1 and this is a type of combustion reaction.