which molecules show an appropriate number of bonds around each carbon atom? select the three that apply.

Explanation:

Step1: Recall carbon - bonding rule

Carbon has a valence of 4, meaning it forms 4 bonds.

Step2: Analyze first structure

In the first structure (a simple alcohol), each carbon has 4 bonds (either C - H, C - C, or C - O).

Step3: Analyze second structure

In the second structure (an aldehyde - like with additional hydroxyls), each carbon has 4 bonds (C - H, C - C, C = O, C - O).

Step4: Analyze third structure

In the third structure (a heterocyclic compound), each carbon has 4 bonds (C - H, C - C, C = O, C - N).

Step5: Analyze fourth structure

In the fourth structure (an amino - acid like), each carbon has 4 bonds (C - H, C - C, C = O, C - N).

Step6: Analyze fifth structure

In the fifth structure (an alkene with an additional methyl), each carbon has 4 bonds (C - H, C - C, C = C).

Answer:

All of the given structures show appropriate number of bonds around each carbon atom.