Molar and molecular weight of UO2

• Molecular formula: UO2 or O2U
• Relative molecular weight of UO2: 270.02771
• Molar mass of UO2: 270.02771 g/mol (0.27003 kg/mol)

Calculation of the relative molecular and molar mass of UO2

• Mr[UO2] = Ar[O] * 2 + Ar[U] = 15.9994 * 2 + 238.02891 = 270.02771
• Molar mass (kg/mol) = Mr[UO2] : 1000 = 270.02771 : 1000 = 0.27003 kg/mol

UO2: percent composition by element

• Oxygen (O) = 31.9988 : 270.02771 * 100 = 11.85 %
• Uranium (U) = 238.02891 : 270.02771 * 100 = 88.15 %

Molar mass calculator