Molar and molecular weight of Na2SeO3

• Molecular formula: Na2SeO3 or Na2O3Se
• Relative molecular weight of Na2SeO3: 172.93773856
• Molar mass of Na2SeO3: 172.93773856 g/mol (0.17294 kg/mol)

Calculation of the relative molecular and molar mass of Na2SeO3

• Mr[Na2SeO3] = Ar[Na] * 2 + Ar[O] * 3 + Ar[Se] = 22.98976928 * 2 + 15.9994 * 3 + 78.96 = 172.93773856
• Molar mass (kg/mol) = Mr[Na2SeO3] : 1000 = 172.93773856 : 1000 = 0.17294 kg/mol

Na2SeO3: percent composition by element

• Sodium (Na) = 45.97953856 : 172.93773856 * 100 = 26.587 %
• Oxygen (O) = 47.9982 : 172.93773856 * 100 = 27.755 %
• Selenium (Se) = 78.96 : 172.93773856 * 100 = 45.658 %

Molar mass calculator