Molar and molecular weight of Na2SO3

• Molecular formula: Na2SO3 or Na2O3S
• Relative molecular weight of Na2SO3: 126.04273856
• Molar mass of Na2SO3: 126.04273856 g/mol (0.12604 kg/mol)

Calculation of the relative molecular and molar mass of Na2SO3

• Mr[Na2SO3] = Ar[Na] * 2 + Ar[O] * 3 + Ar[S] = 22.98976928 * 2 + 15.9994 * 3 + 32.065 = 126.04273856
• Molar mass (kg/mol) = Mr[Na2SO3] : 1000 = 126.04273856 : 1000 = 0.12604 kg/mol

Na2SO3: percent composition by element

• Sodium (Na) = 45.97953856 : 126.04273856 * 100 = 36.479 %
• Oxygen (O) = 47.9982 : 126.04273856 * 100 = 38.081 %
• Sulfur (S) = 32.065 : 126.04273856 * 100 = 25.44 %

Molar mass calculator