Molar and molecular weight of Na2O2

• Relative molecular weight of Na2O2: 77.97833856
• Molar mass of Na2O2: 77.97833856 g/mol (0.07798 kg/mol)

Calculation of the relative molecular and molar mass of Na2O2

• Mr[Na2O2] = Ar[Na] * 2 + Ar[O] * 2 = 22.98976928 * 2 + 15.9994 * 2 = 77.97833856
• Molar mass (kg/mol) = Mr[Na2O2] : 1000 = 77.97833856 : 1000 = 0.07798 kg/mol

Na2O2: percent composition by element

• Sodium (Na) = 45.97953856 : 77.97833856 * 100 = 58.965 %
• Oxygen (O) = 31.9988 : 77.97833856 * 100 = 41.035 %

Molar mass calculator