Molar and molecular weight of NaAsO2

• Molecular formula: NaAsO2 or AsNaO2
• Relative molecular weight of NaAsO2: 129.91016928
• Molar mass of NaAsO2: 129.91016928 g/mol (0.12991 kg/mol)

Calculation of the relative molecular and molar mass of NaAsO2

• Mr[NaAsO2] = Ar[As] + Ar[Na] + Ar[O] * 2 = 74.9216 + 22.98976928 + 15.9994 * 2 = 129.91016928
• Molar mass (kg/mol) = Mr[NaAsO2] : 1000 = 129.91016928 : 1000 = 0.12991 kg/mol

NaAsO2: percent composition by element

• Arsenic (As) = 74.9216 : 129.91016928 * 100 = 57.672 %
• Sodium (Na) = 22.98976928 : 129.91016928 * 100 = 17.697 %
• Oxygen (O) = 31.9988 : 129.91016928 * 100 = 24.631 %

Molar mass calculator