Molar and molecular weight of K2O2

• Relative molecular weight of K2O2: 110.1954
• Molar mass of K2O2: 110.1954 g/mol (0.1102 kg/mol)

Calculation of the relative molecular and molar mass of K2O2

• Mr[K2O2] = Ar[K] * 2 + Ar[O] * 2 = 39.0983 * 2 + 15.9994 * 2 = 110.1954
• Molar mass (kg/mol) = Mr[K2O2] : 1000 = 110.1954 : 1000 = 0.1102 kg/mol

K2O2: percent composition by element

• Potassium (K) = 78.1966 : 110.1954 * 100 = 70.962 %
• Oxygen (O) = 31.9988 : 110.1954 * 100 = 29.038 %

Molar mass calculator