Final answer:
Aspirin has the molecular formula C9H8O4, consisting of 9 carbon atoms, 8 hydrogen atoms, and 4 oxygen atoms, with a molecular mass of 180.15 amu.
Step-by-step explanation:
The molecular formula of aspirin is C9H8O4. This means that an aspirin molecule is made up of 9 carbon (C) atoms, 8 hydrogen (H) atoms, and 4 oxygen (O) atoms. The molecular mass of an aspirin molecule is the sum of the atomic masses of these atoms, which amounts to 180.15 atomic mass units (amu).