Molar and molecular weight of HCOOH

• Molecular formula: HCOOH or CH2O2
• Relative molecular weight of HCOOH: 46.02538
• Molar mass of HCOOH: 46.02538 g/mol (0.04603 kg/mol)

Calculation of the relative molecular and molar mass of HCOOH

• Mr[HCOOH] = Ar[C] + Ar[H] * 2 + Ar[O] * 2 = 12.0107 + 1.00794 * 2 + 15.9994 * 2 = 46.02538
• Molar mass (kg/mol) = Mr[HCOOH] : 1000 = 46.02538 : 1000 = 0.04603 kg/mol

HCOOH: percent composition by element

• Carbon (C) = 12.0107 : 46.02538 * 100 = 26.096 %
• Hydrogen (H) = 2.01588 : 46.02538 * 100 = 4.38 %
• Oxygen (O) = 31.9988 : 46.02538 * 100 = 69.524 %

Molar mass calculator