Aluminum (Al): 2 atoms × 26.98 g/mol = 53.96 g/mol
Sulfur (S): 3 atoms × 32.06 g/mol = 96.18 g/mol
Oxygen (O): 12 atoms × 16.00 g/mol = 192.00 g/mol
Molar mass of Al2(SO4)3 = 53.96 g/mol (2) + 96.18 g/mol (3) + 192.00 g/mol (12)
= 107.92 g/mol + 288.54 g/mol + 1920.00 g/mol
= 2306.46 g/mol
Rounding to the nearest gram, the molar mass of aluminum sulfate is 2306 g/mol.