What is the molar mass of acetic anhydride?

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.