Molar and molecular weight of RbBr

• Molecular formula: RbBr or BrRb
• Relative molecular weight of RbBr: 165.3718
• Molar mass of RbBr: 165.3718 g/mol (0.16537 kg/mol)

Calculation of the relative molecular and molar mass of RbBr

• Mr[RbBr] = Ar[Br] + Ar[Rb] = 79.904 + 85.4678 = 165.3718
• Molar mass (kg/mol) = Mr[RbBr] : 1000 = 165.3718 : 1000 = 0.16537 kg/mol

RbBr: percent composition by element

• Bromine (Br) = 79.904 : 165.3718 * 100 = 48.318 %
• Rubidium (Rb) = 85.4678 : 165.3718 * 100 = 51.682 %

Molar mass calculator