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Question

(B) The molecular formula $C_7H_{16}$ corresponds to an alkane $(C_nH_{2n+2})$.To find the number of structural isomers,we draw the carbon skeletons:$

Vedclass · Accepted Answer

$9$

Vedclass · Answer

(B) The molecular formula $C_7H_{16}$ corresponds to an alkane $(C_nH_{2n+2})$.To find the number of structural isomers,we draw the carbon skeletons:$1$. $n$-heptane: $CH_3-CH_2-CH_2-CH_2-CH_2-CH_2-CH_3$$2$. $2$-methylhexane: $CH_3-CH(CH_3)-CH_2-CH_2-CH_2-CH_3$$3$. $3$-methylhexane: $CH_3-CH_2-CH(CH_3)-CH_2-CH_2-CH_3$$4$. $3$-ethylpentane: $CH_3-CH_2-CH(CH_2CH_3)-CH_2-CH_3$$5$. $2,2$-dimethylpentane: $CH_3-C(CH_3)_2-CH_2-CH_2-CH_3$$6$. $2,3$-dimethylpentane: $CH_3-CH(CH_3)-CH(CH_3)-CH_2-CH_3$$7$. $2,4$-dimethylpentane: $CH_3-CH(CH_3)-CH_2-CH(CH_3)-CH_3$$8$. $3,3$-dimethylpentane: $CH_3-CH_2-C(CH_3)_2-CH_2-CH_3$$9$. $2,2,3$-trimethylbutane: $CH_3-C(CH_3)_2-CH(CH_3)-CH_3$There are a total of $9$ structural isomers for $C_7H_{16}$.

The number of possible structural isomers for a compound with the molecular formula $C_7H_{16}$ is

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