Arsenic acid [H3AsO4] is an inorganic compound of three elements: Hydrogen (H), Arsenic (As), and Oxygen (O). The molecular weight of Arsenic acid is 141.943195 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Hydrogen, Arsenic, and Oxygen.
![Arsenic Acid [H3AsO4] Molecular Weight Calculation](https://www.laboratorynotes.com/wp-content/uploads/2023/05/fi-arsenic-acid-molecular-weight-calculation-100x98.jpg "Arsenic Acid [H3AsO4] Molecular Weight Calculation")