# Chapter 3 - Exercises - Page 133: 118

a) ethane b) $CH_3CH_2CH_2CH_2CH_3$ c) hexane d) $CH_3CH_2CH_2CH_2CH_2CH_2CH_3$

#### Work Step by Step

a) 2 carbon atoms in the alkane. So, its name is ethane b) pentane has 5 carbon atoms and 12 hydrogen atoms. Its formula is $CH_3CH_2CH_2CH_2CH_3$ c) 6 carbon atoms in the alkane. So, its name is hexane d) heptane has 7 carbon atoms and 16 hydrogen atoms. Its formula is $CH_3CH_2CH_2CH_2CH_2CH_2CH_3$

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