Molar and molecular weight of C7H6O3

• Molecular formula: C7H6O3 or HOC6H4COOH
• Relative molecular weight of C7H6O3: 138.12074
• Molar mass of C7H6O3: 138.12074 g/mol (0.13812 kg/mol)

Calculation of the relative molecular and molar mass of C7H6O3

• Mr[C7H6O3] = Ar[C] * 7 + Ar[H] * 6 + Ar[O] * 3 = 12.0107 * 7 + 1.00794 * 6 + 15.9994 * 3 = 138.12074
• Molar mass (kg/mol) = Mr[C7H6O3] : 1000 = 138.12074 : 1000 = 0.13812 kg/mol

C7H6O3: percent composition by element

• Carbon (C) = 84.0749 : 138.12074 * 100 = 60.871 %
• Hydrogen (H) = 6.04764 : 138.12074 * 100 = 4.379 %
• Oxygen (O) = 47.9982 : 138.12074 * 100 = 34.751 %

Molar mass calculator