Molar and molecular weight of Na2HPO4

• Molecular formula: Na2HPO4 or HNa2O4P
• Relative molecular weight of Na2HPO4: 141.95884056
• Molar mass of Na2HPO4: 141.95884056 g/mol (0.14196 kg/mol)

Calculation of the relative molecular and molar mass of Na2HPO4

• Mr[Na2HPO4] = Ar[H] + Ar[Na] * 2 + Ar[O] * 4 + Ar[P] = 1.00794 + 22.98976928 * 2 + 15.9994 * 4 + 30.973762 = 141.95884056
• Molar mass (kg/mol) = Mr[Na2HPO4] : 1000 = 141.95884056 : 1000 = 0.14196 kg/mol

Na2HPO4: percent composition by element

• Hydrogen (H) = 1.00794 : 141.95884056 * 100 = 0.71 %
• Sodium (Na) = 45.97953856 : 141.95884056 * 100 = 32.389 %
• Oxygen (O) = 63.9976 : 141.95884056 * 100 = 45.082 %
• Phosphorus (P) = 30.973762 : 141.95884056 * 100 = 21.819 %

Molar mass calculator