To find the molar mass of aluminum acetate
aluminum acetate, the chemical formula is $Al (C_2H_3O_2) _3 $. To find its molar mass, the relative atomic mass of each element needs to be known and calculated according to the chemical formula.

The relative atomic mass of aluminum ($Al $) is about 27 dollars $. The relative atomic mass of carbon ($C $) is about 12 dollars $, the relative atomic mass of hydrogen ($H $) is about 1 dollar $, and the relative atomic mass of oxygen ($O $) is about 16 dollars $.

In $Al (C_2H_3O_2) _3 $:
- Aluminum atoms have 1 dollar $, and their contribution relative atomic mass is 27 dollars × 1 = 27 $.
- Carbon atoms have 2 dollars × 3 = 6 $, and their contribution relative atomic mass is 12 dollars × 6 = 72 $.
- Hydrogen atoms have 3 dollars × 3 = 9 $, and their contribution relative atomic mass is 1 dollar × 9 = 9 $.
- Oxygen atoms have 2 dollars × 3 = 6 $, and their contribution relative atomic mass is 16 dollars × 6 = 96 $.

Therefore, the molar mass of aluminum acetate is the sum of the relative atomic masses contributed by each atom, that is, 27 dollars + 72 + 9 + 96 = 204 g/mol $.

In summary, the molar mass of aluminum acetate is $204 g/mol $.