The molar mass of acetic anhydride (C4H6O3) is calculated by adding together the atomic masses of its constituent atoms. Acetic anhydride consists of four carbon (C) atoms, six hydrogen (H) atoms, and three oxygen (O) atoms.
Here’s the breakdown:
- Carbon (C): 4 atoms × 12.01 g/mol = 48.04 g/mol
- Hydrogen (H): 6 atoms × 1.008 g/mol = 6.048 g/mol
- Oxygen (O): 3 atoms × 16.00 g/mol = 48.00 g/mol
When we add these together:
48.04 g/mol (C) + 6.048 g/mol (H) + 48.00 g/mol (O) = 102.088 g/mol
Thus, the molar mass of acetic anhydride is approximately 102.09 g/mol. This value is vital in stoichiometric calculations involving reactions that utilize acetic anhydride.