# Chapter 3 - Exercises: 117

a) $CH_3CH_2CH_3$ b) propane c) $CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3$ d) pentane

#### Work Step by Step

a) propane has 3 carbon atoms and 8 hydrogen atoms. Its formula is $CH_3CH_2CH_3$ b) 3 carbon atoms in the alkane. So, its name is propane c) octane has 8 carbon atoms and 18 hydrogen atoms. Its formula is $CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3$ d) 5 carbon atoms in the alkane. So, its name is pentane

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