Here's how to calculate the concentration of the aluminum acetate solution:

1. Determine the Molar Mass of Aluminum Acetate

* Aluminum (Al): 26.98 g/mol

* Acetate (CH₃COO⁻): 59.04 g/mol

* Aluminum Acetate (Al(CH₃COO)₃): 26.98 + (3 * 59.04) = 204.10 g/mol

2. Convert the Mass of Aluminum Acetate to Moles

* Moles = Mass / Molar Mass

* Moles = 33.4 g / 204.10 g/mol = 0.164 mol

3. Convert the Volume of Solution to Liters

* 660 ml = 0.660 L

4. Calculate the Concentration (Molarity)

* Molarity (M) = Moles of Solute / Liters of Solution

* Molarity = 0.164 mol / 0.660 L = 0.248 M

Therefore, the concentration of the aluminum acetate solution is 0.248 M.