It seems like there has been a misunderstanding here. According to the molecular structure you mentioned, “Cr2O3H2O” does not seem to be the correct structure of a molecule. It might be an incorrect representation of a compound containing chromium and oxygen, but it’s unclear what the addition of a water molecule (H2O) at the end implies.
You might be thinking of Cr2O3, which is chromium(III) oxide, a green solid insoluble in water, with strong oxidizing properties, and is commonly used in electroplating and ink manufacturing.
If you are trying to write an educational piece about a specific chemical, I would advise you to ensure you have the correct molecular structure before you start.