Unfortunately, there is no chemical substance with the formula Hg3Sb2. This could be a mistake in notation or misinformation. The common variants of compounds between mercury (Hg) and antimony (Sb) are HgSb (mercury antimonide) and Hg3Sb2O6 (mercury(II) antimonate).
However, to help students understand better about the structure of these compounds, we can assume a substance with the formula Hg3Sb2. In this case, the substance would contain 3 mercury atoms and 2 antimony atoms. The total atomic mass of this substance would equal the sum of the masses of all constituent atoms.
The physical and chemical properties of this substance would depend on various factors, including how these atoms bond with each other and their spatial arrangement. It would also be affected by the individual properties of mercury and antimony.
The chemical equation of the substance Hg3Sb2 would depend on how the atoms bond with each other and other factors like temperature and pressure.
For preparation, there is no specific information about Hg3Sb2 as there is no such compound, but the preparation of mercury antimonide (HgSb) or mercury(II) antimonate (Hg3Sb2O6) can be carried out using complex chemical reactions.