Molar and molecular weight of WO3

• Molecular formula: WO3 or O3W
• Relative molecular weight of WO3: 231.8382
• Molar mass of WO3: 231.8382 g/mol (0.23184 kg/mol)

Calculation of the relative molecular and molar mass of WO3

• Mr[WO3] = Ar[O] * 3 + Ar[W] = 15.9994 * 3 + 183.84 = 231.8382
• Molar mass (kg/mol) = Mr[WO3] : 1000 = 231.8382 : 1000 = 0.23184 kg/mol

WO3: percent composition by element

• Oxygen (O) = 47.9982 : 231.8382 * 100 = 20.703 %
• Tungsten (W) = 183.84 : 231.8382 * 100 = 79.297 %

Molar mass calculator