Final answer:
The molecular formula C9H8O4 represents aspirin, which is an NSAID used for pain relief, and is different from acetaminophen (C8H9NO2), found in Tylenol.
Step-by-step explanation:
The molecular formula C9H8O4 corresponds to aspirin, which is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce fever, and reduce inflammation. Aspirin is different from acetaminophen (also called paracetamol), which is another popular pain reliever with the molecular formula C8H9NO2 and is the active ingredient in Tylenol. Aspirin is known scientifically as acetylsalicylic acid, and its use can sometimes result in side effects such as gastric distress and ringing in the ears, although it generally has fewer side effects compared to other pain relief medications. Unlike aspirin, acetaminophen has fewer side effects like gastric distress and, importantly, an overdose can lead to severe liver damage.