Questions: How many different molecules are drawn below?

How many different molecules are drawn below?
Transcript text: How many different molecules are drawn below?
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Solution

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Solution Steps

Step 1: Analyze the structures

The question asks how many different molecules are shown. Different molecules will have different connectivities between atoms. Rotating a molecule does not create a new molecule.

Step 2: Identify identical molecules

The first molecule (top left) is identical to the fourth molecule (bottom left): both are 3-methylpentane. The second molecule (top middle) is identical to the fifth molecule (bottom middle) and the sixth molecule (bottom right): all are 2-methylpentane. The third molecule (top right) is 2-ethylbutane.

Step 3: Count the unique molecules

There are three unique molecules shown: 3-methylpentane, 2-methylpentane, and 2-ethylbutane.

Final Answer

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