Arsenic triselenide [As2Se3] is an inorganic compound of two elements: Arsenic (As) and Selenium (Se). The molecular weight of Arsenic triselenide is 386.75619 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.
![Arsenic Triselenide [As2Se3] Molecular Weight Calculation](https://www.laboratorynotes.com/wp-content/uploads/2023/05/fi-arsenic-triselenide-molecular-weight-calculation-100x89.jpg "Arsenic Triselenide [As2Se3] Molecular Weight Calculation")