Final answer:
1 mole of O₂ contains the same number of molecules as 2 moles of CH3CO₂OH and 1 mole of CH3CO₂H.
Step-by-step explanation:
1 mole of O₂ contains the same number of molecules as 2 moles of CH3CO₂OH and 1 mole of CH3CO₂H. Therefore, the correct answer is all of the above.