Unfortunately, the chemical substance Ag3H2As does not exist. You may have written the formula incorrectly or confused it with another chemical substance.
Based on chemical symbols, Ag is the symbol for Silver; H2 could be Hydrogen or it can also represent two Hydrogen atoms; As is the symbol for Arsenic. However, their combination to form Ag3H2As is not logical according to chemical rules.
To resolve your query, I would advise you to review the chemical formula you provided, perhaps you mistyped or confused it with another chemical substance.
Make sure that you are providing accurate and valid information about the chemical substance that you want to know. Here are some examples of chemical substances containing Silver (Ag) and Arsenic (As): Ag3AsO4 (Silver Arsenate), H3AsO4 (Arsenic Acid), AgAs (Silver Arsenide), etc.
If you have questions about a different specific chemical substance, please provide more specific and accurate information so I can assist you.