Question

3. What is the molecular formula of your assigned molecule (for example, the molecular formula

for glucose is C6H1206)?

Answer 1

`C_(17)H_(18)FN_3O_3`

Step-by-step explanation:

In the figure attached, I have numbered the carbon atoms to permit to count them easily.

1. Carbon atoms

Each vertex without a letter represents a carbon atom:

• Count them: 17 (they are numbered on the figure attached)

2. Hydrogen atoms

For each carbon subract 1 for each bond and subtract 1 for each group attached to it:

• Carbon 1: 4 - 2 = 2
• Carbon 2: 4 - 2 = 2
• Carbon 3: 4 - 2 = 2
• Carbon 4: 4 - 2 = 2
• Carbon 5: 4 - 4 = 0
• Carbon 6: 4 - 4 = 0
• Carbon 7: 4 - 3 = 1
• Carbon 8: 4 - 4 = 0
• Carbon 9: 4 - 4 = 0
• Carbon 10: 4 - 3 = 1
• Carbon 11: 4 - 4 = 0
• Carbon 12: 4 - 4 = 0
• Carbon 13: 4 - 3 = 1
• Carbon 14: 4 - 3 = 1
• Carbon 15: 4 - 2 = 2
• Carbon 16: 4 - 2 = 2
• Carbon 17: 4 - 4 = 0

Total H atoms attached to C atoms:

• 2 + 2 + 2 + 2 + 1 + 1 + 1 + 1 + 2 + 2 = 16

• H in NH group: 1

• H in OH group: 1

Total H atoms in all: 16 + 2 = 18

3. Fluorine atoms

Count them:

• F: 1

4. Nitrogen atoms

Count them:

• N: 3

5. Oxygen atoms

Count them:

• O: 3

6. Molecular formula

Summary:

• C: 17
• H: 18
• F: 1
• N: 3
• O: 3

Molecular formula:

`C_(17)H_(18)FN_3O_3`