Questions: A model of an alkane appears in the window below. Which of the following represent structural isomers of the molecule shown in the model? Choose all that apply. CH₃-CH₂-CH₂-CH₂-CH₂ CH₂-CH₂-CH₃

A model of an alkane appears in the window below. Which of the following represent structural isomers of the molecule shown in the model? Choose all that apply. CH₃-CH₂-CH₂-CH₂-CH₂ CH₂-CH₂-CH₃
Transcript text: //prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [Reforences] A model of an alkane appears in the window below. Which of the following represent structural isomers of the molecule shown in the model? Choose all that apply. $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$
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Solution

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Solution Steps

Step 1: Analyze the given structure

The 3D model represents 2,2-dimethylpentane. Its molecular formula is C₇H₁₆. Structural isomers will also have the formula C₇H₁₆ but with different atom connectivity.

Step 2: Analyze option 1

The first option shows the structure of 2,2-dimethylpentane, which is the same as the given model. It is not an isomer, but the same molecule.

Step 3: Analyze option 2

The second option is n-octane, which has the molecular formula C₈H₁₈. It's not an isomer because it doesn't have the same molecular formula as the given structure.

Step 4: Analyze option 3

The third option shows the structure of 2,4-dimethylpentane. Its molecular formula is C₇H₁₆. The connectivity of atoms is different from the original structure. It's a structural isomer.

Step 5: Analyze option 4

The fourth option represents isobutane or methylpropane. It has a molecular formula of C₄H₁₀. It is not an isomer since its molecular formula differs from the given structure.

Final Answer

The only structural isomer shown is:

CH₃ CH₃ | | CH₃-CH-CH₂-CH-CH₃ | CH₃ (2,4-dimethylpentane)

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