Molar and molecular weight of BFe2

• Molecular formula: BFe2 or Fe2B
• Relative molecular weight of BFe2: 122.501
• Molar mass of BFe2: 122.501 g/mol (0.1225 kg/mol)

Calculation of the relative molecular and molar mass of BFe2

• Mr[BFe2] = Ar[B] + Ar[Fe] * 2 = 10.811 + 55.845 * 2 = 122.501
• Molar mass (kg/mol) = Mr[BFe2] : 1000 = 122.501 : 1000 = 0.1225 kg/mol

BFe2: percent composition by element

• Boron (B) = 10.811 : 122.501 * 100 = 8.825 %
• Iron (Fe) = 111.69 : 122.501 * 100 = 91.175 %

Molar mass calculator