The molecular weight of Antimony(III) triacetate [Sb(CH₃COO)₃] is 298.8926.

Antimony(III) triacetate [Sb(CH₃COO)₃] is an organic compound of four elements: Antimony, Carbon, Hydrogen, and Oxygen. The molecular weight of Antimony(III) triacetate is 298.8926 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Antimony, Carbon, Hydrogen, and Oxygen.

CALCULATION PROCEDURE: Antimony(III) triacetate [Sb(CH₃COO)₃] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Antimony(III) triacetate molecule.
You will know different atoms and their number in an Antimony(III) triacetate molecule from the chemical formula. The chemical formula of Antimony(III) triacetate is [Sb(CH₃COO)₃]. From the chemical formula, you can find that one molecule of Antimony(III) triacetate has six Carbon (C) atoms, nine Hydrogen (H) atoms, six Oxygen (O) atoms, and one Antimony (Sb) atom.

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 Oxygen (O): 15.9994 (Ref: Jlab-ele008)
Atomic weight of Antimony (Sb): 121.76 (Ref: Jlab-ele051, ciaaw-antimony)

Step 3: Calculate the total weight of each atom in an Antimony(III) triacetate molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Antimony(III) triacetate: 6
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Antimony(III) triacetate: 12.0107 x 6 = 72.0642

Number of Hydrogen atoms in Antimony(III) triacetate: 9
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Antimony(III) triacetate: 1.008 x 9 = 9.072

Number of Oxygen atoms in Antimony(III) triacetate: 6
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Antimony(III) triacetate: 15.9994 x 6 = 95.9964

Number of Antimony (Sb) atoms in Antimony(III) triacetate: 1
Atomic weight of Antimony (Sb): 121.76
Total weight of Antimony(III) atoms in Antimony(III) triacetate: 121.76 x 1 = 121.76

Step 4: Calculate the molecular weight of Antimony(III) triacetate by adding up the total weight of all atoms.

Molecular weight of Antimony(III) triacetate: 72.0642 (Carbon) + 9.072 (Hydrogen) + 95.9964 (Oxygen) + 121.76 (Antimony) = 298.8926

So the molecular weight of Antimony(III) triacetate is 298.8926.

Antimony(III) triacetate [Sb(CH₃COO)₃] 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-ele051: https://education.jlab.org/itselemental/ele051.html
  
• ciaaw-antimony: https://www.ciaaw.org/antimony.htm
  

See also:

• Apiose (C5H10O5) Molecular Weight Calculation