Molar and molecular weight of Na2B4O7

• Molecular formula: Na2B4O7 or B4Na2O7
• Relative molecular weight of Na2B4O7: 201.21933856
• Molar mass of Na2B4O7: 201.21933856 g/mol (0.20122 kg/mol)

Calculation of the relative molecular and molar mass of Na2B4O7

• Mr[Na2B4O7] = Ar[B] * 4 + Ar[Na] * 2 + Ar[O] * 7 = 10.811 * 4 + 22.98976928 * 2 + 15.9994 * 7 = 201.21933856
• Molar mass (kg/mol) = Mr[Na2B4O7] : 1000 = 201.21933856 : 1000 = 0.20122 kg/mol

Na2B4O7: percent composition by element

• Boron (B) = 43.244 : 201.21933856 * 100 = 21.491 %
• Sodium (Na) = 45.97953856 : 201.21933856 * 100 = 22.85 %
• Oxygen (O) = 111.9958 : 201.21933856 * 100 = 55.659 %

Molar mass calculator