Unfortunately, detailed information about the chemical equation 2Cr2O3 + 3Rg -> 4CrRgO3cannotbeprovidedbecauseRg(Roentgenium)isanunstableelementandisrarelyusedinchemistry. It also does not form any known stable compounds. Additionally, there is no information about the reaction conditions, reaction process, or phenomena that occur due to the lack of information about the interaction between Rg and Cr2O3.