Molar and molecular weight of HBr

• Relative molecular weight of HBr: 80.91194
• Molar mass of HBr: 80.91194 g/mol (0.08091 kg/mol)

Calculation of the relative molecular and molar mass of HBr

• Mr[HBr] = Ar[H] + Ar[Br] = 1.00794 + 79.904 = 80.91194
• Molar mass (kg/mol) = Mr[HBr] : 1000 = 80.91194 : 1000 = 0.08091 kg/mol

HBr: percent composition by element

• Hydrogen (H) = 1.00794 : 80.91194 * 100 = 1.246 %
• Bromine (Br) = 79.904 : 80.91194 * 100 = 98.754 %

Molar mass calculator