Arsenous acid [H3AsO3] is an inorganic compound of three elements: Hydrogen (H), Arsenic (As), and Oxygen (O). The molecular weight of Arsenous acid is 125.943795 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Hydrogen, Arsenic, and Oxygen.
![Arsenous Acid [H3AsO3] Molecular Weight Calculation](https://www.laboratorynotes.com/wp-content/uploads/2023/05/fi-arsenous-acid-molecular-weight-calculation-100x96.jpg "Arsenous Acid [H3AsO3] Molecular Weight Calculation")