Ans: The chemical formula for Methanoic acid is HCOOH. It comprises a Hydrogen atom bonded to a carboxylic acid group. The Hydrogen atom does not interfere much with the O-C-O bond angle, which is 116.8 degrees. The dihedral angle of the H-C-O-O bond is 180 degrees. The structural formula of Formic Acid determines its physical and chemical properties.