How many total H atoms are present in the structure shown below?

Name: How many total H atoms are present in the structure shown below?
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Question

Quizplus · Accepted Answer

Counting the number of H atoms present in the molecule, we get: 
- 6 H atoms in the six-membered ring on the left
- 6 H atoms in the six-membered ring on the right
- 2 H atoms in the carboxylic acid group
- 4 H atoms in the two NH2 groups 
So the total number of H atoms is 6+6+2+4=18 H atoms. Option B is the correct choice.

How Many Total H Atoms Are Present in the Structure