Question

how many different molecules are drawn below?

Explanation:

Step1: Analyze molecular structures

Check for unique connectivity of atoms and bond types.

Step2: Compare structures

By comparing carbon - carbon bond arrangements (single, double bonds) and overall molecular shapes, we find that some are isomers and some are identical in structure. After careful inspection, we can group them into distinct sets.

Step3: Count distinct groups

We find that there are 3 distinct sets of molecular structures.

Answer:

3