Answer:
Step-by-step explanation:
The reason is that alkanes are saturated hydrocarbons composed of single covalent bonds between carbon atoms. C3H8 specifically represents propane, which has three carbon atoms and eight hydrogen atoms, and all the carbon-carbon bonds in propane are single bonds, making it an alkane. Alkenes contain at least one carbon-carbon double bond, alkynes contain at least one carbon-carbon triple bond, and cycloalkanes are cyclic alkanes. However, since C3H8 has only single bonds, it falls into the category of alkanes.