The chemical formula for ethanol is C₂H₅OH. This shows that in one molecule of ethanol, there are:
- 2 carbon (C) atoms
- 6 hydrogen (H) atoms (5 from C₂H₅ and 1 from OH, totaling 6)
- 1 oxygen (O) atom
So, the correct answer is: C. 2 carbon atoms, 5 hydrogen atoms, and 1 oxygen atom.
Please note that the initial statement had an error in the number of hydrogen atoms; the provided chemical structure was incomplete as it didn't show the oxygen atom, which is part of ethanol. However, the correct count of atoms gives us the conclusion as above.