Molar and molecular weight of Al2(SO4)3

• Molecular formula: Al2(SO4)3 or Al2O12S3
• Relative molecular weight of Al2(SO4)3: 342.1508772
• Molar mass of Al2(SO4)3: 342.1508772 g/mol (0.34215 kg/mol)

Calculation of the relative molecular and molar mass of Al2(SO4)3

• Mr[Al2(SO4)3] = Ar[Al] * 2 + Ar[O] * 12 + Ar[S] * 3 = 26.9815386 * 2 + 15.9994 * 12 + 32.065 * 3 = 342.1508772
• Molar mass (kg/mol) = Mr[Al2(SO4)3] : 1000 = 342.1508772 : 1000 = 0.34215 kg/mol

Al2(SO4)3: percent composition by element

• Aluminum (Al) = 53.9630772 : 342.1508772 * 100 = 15.772 %
• Oxygen (O) = 191.9928 : 342.1508772 * 100 = 56.113 %
• Sulfur (S) = 96.195 : 342.1508772 * 100 = 28.115 %

Molar mass calculator