Molar and molecular weight of Mg(H2PO4)2

• Molecular formula: Mg(H2PO4)2 or H4MgO8P2
• Relative molecular weight of Mg(H2PO4)2: 218.279484
• Molar mass of Mg(H2PO4)2: 218.279484 g/mol (0.21828 kg/mol)

Calculation of the relative molecular and molar mass of Mg(H2PO4)2

• Mr[Mg(H2PO4)2] = Ar[H] * 4 + Ar[Mg] + Ar[O] * 8 + Ar[P] * 2 = 1.00794 * 4 + 24.305 + 15.9994 * 8 + 30.973762 * 2 = 218.279484
• Molar mass (kg/mol) = Mr[Mg(H2PO4)2] : 1000 = 218.279484 : 1000 = 0.21828 kg/mol

Mg(H2PO4)2: percent composition by element

• Hydrogen (H) = 4.03176 : 218.279484 * 100 = 1.847 %
• Magnesium (Mg) = 24.305 : 218.279484 * 100 = 11.135 %
• Oxygen (O) = 127.9952 : 218.279484 * 100 = 58.638 %
• Phosphorus (P) = 61.947524 : 218.279484 * 100 = 28.38 %

Molar mass calculator