Molar and molecular weight of MoO3

• Relative molecular weight of MoO3: 143.9382
• Molar mass of MoO3: 143.9382 g/mol (0.14394 kg/mol)

Calculation of the relative molecular and molar mass of MoO3

• Mr[MoO3] = Ar[Mo] + Ar[O] * 3 = 95.94 + 15.9994 * 3 = 143.9382
• Molar mass (kg/mol) = Mr[MoO3] : 1000 = 143.9382 : 1000 = 0.14394 kg/mol

MoO3: percent composition by element

• Molybdenum (Mo) = 95.94 : 143.9382 * 100 = 66.654 %
• Oxygen (O) = 47.9982 : 143.9382 * 100 = 33.346 %

Molar mass calculator