* Ionic Bonds: Ammonium acetate is formed from the ionic bond between the ammonium ion (NH₄⁺) and the acetate ion (CH₃COO⁻). This means there's a significant difference in electronegativity between the atoms involved in the bond, leading to a separation of charge.

* Polar Covalent Bonds: Within the acetate ion itself, there are polar covalent bonds between the carbon and oxygen atoms (C=O) and the carbon and hydrogen atoms (C-H). Oxygen is more electronegative than carbon, creating a partial negative charge on the oxygen and a partial positive charge on the carbon.

* Overall Polarity: The combination of ionic bonding and polar covalent bonds within the acetate ion leads to an uneven distribution of electron density within the ammonium acetate molecule. This creates a permanent dipole moment, making the molecule polar.

In summary: Ammonium acetate is a polar molecule due to the presence of ionic bonds, polar covalent bonds, and a permanent dipole moment.