Molar and molecular weight of H2S2O7

• Molecular formula: H2S2O7 or H2O7S2
• Relative molecular weight of H2S2O7: 178.14168
• Molar mass of H2S2O7: 178.14168 g/mol (0.17814 kg/mol)

Calculation of the relative molecular and molar mass of H2S2O7

• Mr[H2S2O7] = Ar[H] * 2 + Ar[O] * 7 + Ar[S] * 2 = 1.00794 * 2 + 15.9994 * 7 + 32.065 * 2 = 178.14168
• Molar mass (kg/mol) = Mr[H2S2O7] : 1000 = 178.14168 : 1000 = 0.17814 kg/mol

H2S2O7: percent composition by element

• Hydrogen (H) = 2.01588 : 178.14168 * 100 = 1.132 %
• Oxygen (O) = 111.9958 : 178.14168 * 100 = 62.869 %
• Sulfur (S) = 64.13 : 178.14168 * 100 = 35.999 %

Molar mass calculator