The molecular weight of Arsenic dioxide [AsO_{2}] is 106.920395.

Arsenic dioxide [AsO_{2}] is an inorganic compound of two elements: Arsenic (As) and Oxygen (O). The molecular weight of Arsenic dioxide is 106.920395 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Arsenic dioxide [AsO**_{2}] Molecular Weight Calculation

_{2}] Molecular Weight Calculation

**Step 1: Find out the chemical formula and determine constituent atoms and their number in an Arsenic dioxide molecule. **From the chemical formula, you will know different atoms and their number in an Arsenic dioxide molecule. The chemical formula of Arsenic dioxide is AsO

_{2}. From the chemical formula, you can find that one molecule of Arsenic dioxide consists of one Arsenic (As) atom and two Oxygen (O) atoms.

**Step 2: Find out the atomic weights of each atom (from the periodic table). **

Atomic weight of Arsenic (As): 74.921595 (Ref: Jlab-ele033, ciaaw-arsenic)

Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

**Step 3: Calculate the molecular weight of Arsenic dioxide by adding the total weight of all atoms. **

Number of Arsenic atoms in Arsenic dioxide: 1

Atomic weight of Arsenic: 74.921595

Total weight of Arsenic atoms in Arsenic dioxide: 74.921595 x 1 = 74.921595

Number of Oxygen (O) atoms in Arsenic dioxide: 2

Atomic weight of Oxygen: 15.9994

Total weight of Oxygen atoms in Arsenic dioxide: 15.9994 x 2 = 31.9988

**Step 4: Calculate the molecular weight of Arsenic dioxide by adding up the total weight of all atoms. **

Molecular weight of Arsenic dioxide: 74.921595 (Arsenic) + 31.9988 (Oxygen) = 106.920395

So the molecular weight of Arsenic dioxide is 106.920395.

**Arsenic dioxide [AsO _{2}] Molecular Weight Calculation**

Molecular weight of Arsenic dioxide [AsO_{2}] | |||

Constituent atoms | Number of each atom | Atomic weight | Total weight |

Arsenic (As) | 1 | 74.921595 | 74.921595 |

Oxygen (O) | 2 | 15.9994 | 31.9988 |

Molecular weight of Arsenic dioxide [AsO_{2}]: | 106.920395 |

## REFERENCES:

- Jlab-ele033: https://education.jlab.org/itselemental/ele033.html
- ciaaw-arsenic: https://www.ciaaw.org/arsenic.htm
- Jlab-ele008: https://education.jlab.org/itselemental/ele008.html

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