Molar and molecular weight of H3BO3

• Relative molecular weight of H3BO3: 61.83302
• Molar mass of H3BO3: 61.83302 g/mol (0.06183 kg/mol)

Calculation of the relative molecular and molar mass of H3BO3

• Mr[H3BO3] = Ar[H] * 3 + Ar[B] + Ar[O] * 3 = 1.00794 * 3 + 10.811 + 15.9994 * 3 = 61.83302
• Molar mass (kg/mol) = Mr[H3BO3] : 1000 = 61.83302 : 1000 = 0.06183 kg/mol

H3BO3: percent composition by element

• Hydrogen (H) = 3.02382 : 61.83302 * 100 = 4.89 %
• Boron (B) = 10.811 : 61.83302 * 100 = 17.484 %
• Oxygen (O) = 47.9982 : 61.83302 * 100 = 77.626 %

Molar mass calculator