Molar and molecular weight of H2S2O8

• Molecular formula: H2S2O8 or H2O8S2
• Relative molecular weight of H2S2O8: 194.14108
• Molar mass of H2S2O8: 194.14108 g/mol (0.19414 kg/mol)

Calculation of the relative molecular and molar mass of H2S2O8

• Mr[H2S2O8] = Ar[H] * 2 + Ar[O] * 8 + Ar[S] * 2 = 1.00794 * 2 + 15.9994 * 8 + 32.065 * 2 = 194.14108
• Molar mass (kg/mol) = Mr[H2S2O8] : 1000 = 194.14108 : 1000 = 0.19414 kg/mol

H2S2O8: percent composition by element

• Hydrogen (H) = 2.01588 : 194.14108 * 100 = 1.038 %
• Oxygen (O) = 127.9952 : 194.14108 * 100 = 65.929 %
• Sulfur (S) = 64.13 : 194.14108 * 100 = 33.033 %

Molar mass calculator