Molar and molecular weight of BBr3

• Relative molecular weight of BBr3: 250.523
• Molar mass of BBr3: 250.523 g/mol (0.25052 kg/mol)

Calculation of the relative molecular and molar mass of BBr3

• Mr[BBr3] = Ar[B] + Ar[Br] * 3 = 10.811 + 79.904 * 3 = 250.523
• Molar mass (kg/mol) = Mr[BBr3] : 1000 = 250.523 : 1000 = 0.25052 kg/mol

BBr3: percent composition by element

• Boron (B) = 10.811 : 250.523 * 100 = 4.315 %
• Bromine (Br) = 239.712 : 250.523 * 100 = 95.685 %

Molar mass calculator