Answer:
n = 5.
Explanation:
How many carbon atoms in total in this straight-chain hydrocarbon?
The prefix of the IUPAC name of a hydrocarbon (the part before -ane) shows the number of carbon atoms on the longest carbon chain.
[tex]\begin{array}{c|c}\text{Number of Carbon}\\ \text{atoms in backbone} & \text{Prefix}\\[-0.5em]\multicolumn{2}{c}{\rule{5cm}{0.5pt}}\\1& \text{meth-} \\ 2&\text{eth-} \\ 3&\text{prop-}\\4 & \text{but-}\\5 & \text{pent-} \\ 6 & \text{hex-} \\ 7 & \text{hept-} \\8 & \text{oct-}\\ \dots & \dots\end{array}[/tex].
Hence the structure:
[tex]\text{CH}_3\text{-CH}_2\text{-CH}_2\text{-CH}_2\text{-CH}_2\text{-CH}_2\text{-CH}_3[/tex].
All the [tex]\text{-CH}_2\text{-}[/tex] in the formula might look redundant. "[tex]\text{CH}_2[/tex]" appears five times in a row and may be condensed into [tex](\text{CH}_2)_5[/tex]. Hence the condensed formula:
[tex]\text{CH}_3\text{-}{(\text{CH}_2)_{\bf5}\text{-CH}_3[/tex].
Therefore [tex]n = 5[/tex].
Answer:
n+5 so the correct answer is b) 5
Explanation:
just did review on edge
