Question

question 3 (1 point)
what is the molecular formula of acetic anhydride?
c7h6o3
hc2h3o2
c9h8o4
c4h6o3

Explanation:

Acetic anhydride is formed by the condensation of two acetic acid (\(HC_2H_3O_2\)) molecules with the loss of one water (\(H_2O\)) molecule.

• Molecular formula of acetic acid: \(C_2H_4O_2\)
• Two acetic acid molecules: \(2\times(C_2H_4O_2)=C_4H_8O_4\)
• After losing one \(H_2O\) (molecular formula \(H_2O\)): \(C_4H_8O_4 - H_2O=C_4H_6O_3\)

Answer:

\(C_4H_6O_3\) (the fourth option)