Concept explainers
(a)
Interpretation:
Line formula for given
(a)

Explanation of Solution
Line formula for 2-methylheptadecane:
From the given name, the parent alkane is found to be heptadecane. Substituent that is present is a methyl group on carbon-2. Line formula for 2-methylheptadecane can be drawn as,
Line formula for 17,21-dimethylheptatriacontane:
From the given name, the parent alkane is found to be heptatriacontane. Substituent that is present are two methyl groups on carbon-17 and carbon-21. Line formula for 17,21-dimethylheptatriacontane can be drawn as,
Line formula for 15,19-dimethylheptatriacontane:
From the given name, the parent alkane is found to be heptatriacontane. Substituent that is present are two methyl groups on carbon-15 and carbon-19. Line formula for 15,19-dimethylheptatriacontane can be drawn as,
Line formula for 15,19,23-trimethylheptatriacontane:
From the given name, the parent alkane is found to be heptatriacontane. Substituent that is present are three methyl groups on carbon-15, carbon-19 and carbon-23. Line formula for 15,19,23-trimethylheptatriacontane can be drawn as,
(c)
Interpretation:
Molar mass of given alkanes has to be calculated..
(c)

Explanation of Solution
Molar mass of 2-methylheptadecane:
Molecular formula of 2-methylheptadecane is given as
Molar mass of 2-methylheptadecane is calculated as shown below,
Therefore, molar mass of 2-methylheptadecane is
Molar mass of 17,21-dimethylheptatriacontane:
Molecular formula of 17,21-dimethylheptatriacontane is given as
Molar mass of 17,21-dimethylheptatriacontane is calculated as shown below,
Therefore, molar mass of 17,21-dimethylheptatriacontane is
Molar mass of 15,19-dimethylheptatriacontane:
Molecular formula of 15,19-dimethylheptatriacontane is given as
Molar mass of 15,19-dimethylheptatriacontane is calculated as shown below,
Therefore, molar mass of 15,19-dimethylheptatriacontane is
Molar mass of 15,19,23-trimethylheptatriacontane:
Molecular formula of 15,19,23-trimethylheptatriacontane is given as
Molar mass of 15,19,23-trimethylheptatriacontane is calculated as shown below,
Therefore, molar mass of 15,19,23-dimethylheptatriacontane is
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