Molar and molecular weight of KClO3

• Molecular formula: KClO3 or ClKO3
• Relative molecular weight of KClO3: 122.5495
• Molar mass of KClO3: 122.5495 g/mol (0.12255 kg/mol)

Calculation of the relative molecular and molar mass of KClO3

• Mr[KClO3] = Ar[Cl] + Ar[K] + Ar[O] * 3 = 35.453 + 39.0983 + 15.9994 * 3 = 122.5495
• Molar mass (kg/mol) = Mr[KClO3] : 1000 = 122.5495 : 1000 = 0.12255 kg/mol

KClO3: percent composition by element

• Chlorine (Cl) = 35.453 : 122.5495 * 100 = 28.93 %
• Potassium (K) = 39.0983 : 122.5495 * 100 = 31.904 %
• Oxygen (O) = 47.9982 : 122.5495 * 100 = 39.166 %

Molar mass calculator