Why is the actually measured hydrogen vapor density of formic acid equal to 92?

To answer this question, let us analyze a more detailed molecular structure of formic (methanic) acid: an acid consists of two oxygen molecules, two hydrogen molecules and one carbon molecule. Moreover, this acid consists of parts of COMPLEX molecules (ie, composed of two simpler), the so-called “dimers”, this structure explains this density. Those. when measuring the density of formic acid in terms of carbon, we cannot consider an individual carbon molecule and measure its density, because it is a dimer and constitutes a complex molecule with hydrogen.