1. Identify the elements and their atomic masses:
* Aluminum (Al): 26.98 g/mol
* Sulfur (S): 32.07 g/mol
* Oxygen (O): 16.00 g/mol
2. Determine the number of atoms of each element in the formula:
* Aluminum (Al): 2 atoms
* Sulfur (S): 3 atoms
* Oxygen (O): 12 atoms (3 x 4 = 12)
3. Calculate the molar mass:
* (2 x 26.98 g/mol) + (3 x 32.07 g/mol) + (12 x 16.00 g/mol) =
* 53.96 g/mol + 96.21 g/mol + 192.00 g/mol =
* 342.17 g/mol
Therefore, the molar mass of aluminum sulfate (Al₂(SO₄)₃) is 342.17 g/mol.
