Molar and molecular weight of H2SO3

• Molecular formula: H2SO3 or H2O3S
• Relative molecular weight of H2SO3: 82.07908
• Molar mass of H2SO3: 82.07908 g/mol (0.08208 kg/mol)

Calculation of the relative molecular and molar mass of H2SO3

• Mr[H2SO3] = Ar[H] * 2 + Ar[O] * 3 + Ar[S] = 1.00794 * 2 + 15.9994 * 3 + 32.065 = 82.07908
• Molar mass (kg/mol) = Mr[H2SO3] : 1000 = 82.07908 : 1000 = 0.08208 kg/mol

H2SO3: percent composition by element

• Hydrogen (H) = 2.01588 : 82.07908 * 100 = 2.456 %
• Oxygen (O) = 47.9982 : 82.07908 * 100 = 58.478 %
• Sulfur (S) = 32.065 : 82.07908 * 100 = 39.066 %

Molar mass calculator