Molar and molecular weight of K2O

• Relative molecular weight of K2O: 94.196
• Molar mass of K2O: 94.196 g/mol (0.0942 kg/mol)

Calculation of the relative molecular and molar mass of K2O

• Mr[K2O] = Ar[K] * 2 + Ar[O] = 39.0983 * 2 + 15.9994 = 94.196
• Molar mass (kg/mol) = Mr[K2O] : 1000 = 94.196 : 1000 = 0.0942 kg/mol

K2O: percent composition by element

• Potassium (K) = 78.1966 : 94.196 * 100 = 83.015 %
• Oxygen (O) = 15.9994 : 94.196 * 100 = 16.985 %

Molar mass calculator