Question: A compound secreted by honeybees to paralyze intruders in their hives is known as 2-heptanone. The formula for this compound is shown.
CH3C4H8COCH3
How many atoms of each element are in one molecule of 2-heptanone?
A. 4 carbon atoms, 11 hydrogen atoms, and 1 oxygen atom
B. 7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom
C. 7 carbon atoms, 11 hydrogen atoms, and 8 oxygen atoms
D. 6 carbon atoms, 14 hydrogen atoms, and 3 oxygen atoms
1. **State the problem:** We need to find the number of atoms of carbon (C), hydrogen (H), and oxygen (O) in one molecule of 2-heptanone given the formula $$\mathrm{CH_3C_4H_8COCH_3}$$.
2. **Analyze the formula:** The formula can be broken down into parts:
- $$\mathrm{CH_3}$$ means 1 carbon and 3 hydrogens.
- $$\mathrm{C_4H_8}$$ means 4 carbons and 8 hydrogens.
- $$\mathrm{CO}$$ means 1 carbon and 1 oxygen.
- $$\mathrm{CH_3}$$ again means 1 carbon and 3 hydrogens.
3. **Count the atoms:**
- Total carbons: $$1 + 4 + 1 + 1 = 7$$
- Total hydrogens: $$3 + 8 + 0 + 3 = 14$$ (no hydrogens in $$\mathrm{CO}$$)
- Total oxygens: $$1$$ (from $$\mathrm{CO}$$)
4. **Conclusion:** The molecule contains 7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom.
5. **Answer choice:** This matches option B.
**Final answer:** B. 7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom