Molar and molecular weight of ORb2

• Molecular formula: ORb2 or Rb2O
• Relative molecular weight of ORb2: 186.935
• Molar mass of ORb2: 186.935 g/mol (0.18694 kg/mol)

Calculation of the relative molecular and molar mass of ORb2

• Mr[ORb2] = Ar[O] + Ar[Rb] * 2 = 15.9994 + 85.4678 * 2 = 186.935
• Molar mass (kg/mol) = Mr[ORb2] : 1000 = 186.935 : 1000 = 0.18694 kg/mol

ORb2: percent composition by element

• Oxygen (O) = 15.9994 : 186.935 * 100 = 8.559 %
• Rubidium (Rb) = 170.9356 : 186.935 * 100 = 91.441 %

Molar mass calculator