, we need to use the chemical formula of ammonium acetate, which is NH4C2H3O2. First, we need to calculate the molar mass of ammonium acetate: Molar mass of NH4C2H3O2 = (1 x 14.01 g/mol) + (4 x 1.01 g/mol) + (2 x 12.01 g/mol) + (3 x 16.00 g/mol) = 77.08 g/mol Next, we can use the molar mass to convert 63.3 g of ammonium acetate to moles: 63.3 g NH4C2H3O2 x (1 mol NH4C2H3O2 / 77.08 g NH4C2H3O2) = 0.820 mol NH