The molecular weight of Arsenobetaine [C₅H₁₁AsO₂] is 178.061895.

Arsenobetaine [C₅H₁₁AsO₂] is an organic compound of four elements: Carbon (C), Hydrogen (H), Arsenic (As), and Oxygen (O). The molecular weight of Arsenobetaine is 178.061895 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Arsenobetaine [C₅H₁₁AsO₂] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Arsenobetaine molecule.
You will know different atoms and their number in an Arsenobetaine molecule from the chemical formula. The chemical formula of Arsenobetaine is [C₅H₁₁AsO₂]. From the chemical formula, you can find that one molecule of Arsenobetaine has five Carbon (C) atoms, eleven Hydrogen (H) atoms, 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 Carbon (C): 12.0107 (Ref: Jlab-ele006)
Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)
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 total weight of each atom in an Arsenobetaine molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Arsenobetaine: 5
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Arsenobetaine: 12.0107 x 5 = 60.0535

Number of Hydrogen atoms in Arsenobetaine: 11
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Arsenobetaine: 1.008 x 11 = 11.088

Number of Arsenic atoms in Arsenobetaine: 1
Atomic weight of Arsenic (As): 74.921595
Total weight of Arsenic atoms in Arsenobetaine: 74.921595 x 1 = 74.921595

Number of Oxygen atoms in Arsenobetaine: 2
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Arsenobetaine: 15.9994 x 2 = 31.9988

Step 4: Calculate the molecular weight of Arsenobetaine by adding up the total weight of all atoms.

Molecular weight of Arsenobetaine: 60.0535 (Carbon) + 11.088 (Hydrogen) + 74.921595 (Arsenic) + 31.9988 (Oxygen) = 178.061895

So the molecular weight of Arsenobetaine is 178.061895.

Arsenobetaine [C₅H₁₁AsO₂] Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Jlab-ele006; https://education.jlab.org/itselemental/ele006.html
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Jlab-ele033: https://education.jlab.org/itselemental/ele033.html
• ciaaw-arsenic: https://www.ciaaw.org/arsenic.htm

RELATED POSTS:

• Element: Arsenic (As)
• Arsenic Trifluoride [AsF₃] Molecular Weight Calculation
• Arsenic Pentafluoride [AsF₅] Molecular Weight Calculation
• Arsenic Trichloride [AsCl₃] Molecular Weight Calculation
• Arsenic Pentachloride [AsCl₅] Molecular Weight Calculation
• Arsenic Tribromide [AsBr₃] Molecular Weight Calculation
• Arsine [AsH₃] Molecular Weight Calculation
• Aluminium Arsenide [AlAs] Molecular Weight Calculation

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