Molar and molecular weight of K3PO4

• Molecular formula: K3PO4 or K3O4P
• Relative molecular weight of K3PO4: 212.266262
• Molar mass of K3PO4: 212.266262 g/mol (0.21227 kg/mol)

Calculation of the relative molecular and molar mass of K3PO4

• Mr[K3PO4] = Ar[K] * 3 + Ar[O] * 4 + Ar[P] = 39.0983 * 3 + 15.9994 * 4 + 30.973762 = 212.266262
• Molar mass (kg/mol) = Mr[K3PO4] : 1000 = 212.266262 : 1000 = 0.21227 kg/mol

K3PO4: percent composition by element

• Potassium (K) = 117.2949 : 212.266262 * 100 = 55.258 %
• Oxygen (O) = 63.9976 : 212.266262 * 100 = 30.15 %
• Phosphorus (P) = 30.973762 : 212.266262 * 100 = 14.592 %

Molar mass calculator