Question

types of reactions
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which type of chemical reaction occurs in $ce{c6h12 + 9o2 -> 6co2 + 6h2o}$?
synthesis
combustion
single replacement
double replacement

Explanation:

The given reaction involves a hydrocarbon ($\text{C}_6\text{H}_{12}$) reacting with oxygen ($\text{O}_2$) to produce carbon dioxide ($\text{CO}_2$) and water ($\text{H}_2\text{O}$), which matches the defining characteristics of a combustion reaction. Synthesis reactions combine simple substances into a complex one, single replacement involves one element replacing another, and double replacement involves swapping of ions between compounds, none of which fit this reaction.

Answer:

combustion