The equation 2Cr2O3 + 3Hg -> 4CrHgO3.

1. Detailed information about the equation 2Cr₂O₃ + 3Hg -> 4CrHgO₃:

   • The above chemical equation describes the reaction between iron (III) oxide (Cr₂O₃) and mercury (Hg) to produce CrHgO₃.
   • According to the equation, every 2 moles of Cr₂O₃ will react with 3 moles of Hg to produce 4 moles of CrHgO₃.

2. Reaction conditions:

   • This reaction usually occurs at high temperatures.
   • A catalyst is needed to accelerate the reaction.

3. Reaction process:

   • First, Cr₂O₃ is reduced by mercury to CrHgO₃.
   • In this process, mercury will react with the oxide of Cr to form CrHgO₃.

4. Phenomena occurring:

   • When the reaction occurs, you will see the color of the mixture change.
   • In addition, if the reaction takes place at high temperatures, heat may be generated, causing the mixture to heat up.

Note: This is a chemical reaction research, should not be conducted at home due to the high toxicity of mercury which can pose a danger to human health.