Final answer:
The molar mass of aspirin (C9H8O4) is calculated by adding the atomic masses of nine carbon atoms, eight hydrogen atoms, and four oxygen atoms, amounting to 180.15 g/mol.
Step-by-step explanation:
To calculate the molar mass of aspirin, which has the molecular formula C9H8O4, you sum up the atomic masses of all the atoms present in one molecule of the compound. The molecular mass of aspirin is the sum of the mass of nine carbon (C) atoms, eight hydrogen (H) atoms, and four oxygen (O) atoms. Using the atomic masses from the periodic table (approximately 12.01 amu for carbon, 1.01 amu for hydrogen, and 16.00 amu for oxygen), the calculation is as follows:
Molecular mass of aspirin = (9 × 12.01 amu) + (8 × 1.01 amu) + (4 × 16.00 amu) = 180.15 amu
So, the molar mass of aspirin (C9H8O4) is 180.15 grams per mole (g/mol).