The molecular weight of Barium carbonate [BaCO₃] is 197.3359.

Barium carbonate [BaCO₃] is an inorganic compound of three elements: Barium, Carbon, and Oxygen. The molecular weight of Barium carbonate is 197.3359 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Barium, Carbon, and Oxygen.

CALCULATION PROCEDURE: Barium carbonate [BaCO₃] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Barium carbonate molecule.
From the chemical formula, you will know different atoms and their number in a Barium carbonate molecule. The chemical formula of Barium carbonate is BaCO₃. From the chemical formula, you can find that one molecule of Barium carbonate has one Barium (Ba) atom, one Carbon (C) atom, and two Oxygen (O) atoms.

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

Atomic weight of Barium (Ba): 137.327 (Ref: Pubchem-56, Ciaaw-barium)
Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the molecular weight of Barium carbonate by adding the total weight of all atoms.

Number of Barium atoms in Barium carbonate: 1
Atomic weight of Barium: 137.327
Total weight of Barium atoms in Barium carbonate: 137.327 x 1 = 137.327

Number of Carbon atoms in Barium carbonate: 1
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Barium carbonate: 12.0107 x 1 = 12.0107

Number of Oxygen atoms in Barium carbonate: 3
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Barium carbonate: 15.9994 x 3 = 47.9982

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

Molecular weight of Barium carbonate [BaCO₃]: 137.327 (Barium) + 12.0107 (Carbon) + 47.9982 (Oxygen) = 197.3359

So the molecular weight of Barium carbonate is 197.3359.

Barium carbonate [BaCO₃] Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Pubchem-56: https://pubchem.ncbi.nlm.nih.gov/element/56
• Ciaaw-barium: https://www.ciaaw.org/barium.htm
• Jlab-ele056: https://education.jlab.org/itselemental/ele056.html
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html 

See also:

• Carbon carbonate molecular weight calculation