The molecular weight of Dimethyl dicarbonate ((CH₃OCO)₂O) is 134.0878.

To calculate molecular weight of any compound, the first step is to know the constituent atoms and their number in that particular compound. Then calculate the total weight of each atom by multiplying its atomic weight by its number. The sum of total weight of all constituent atoms will be the molecular weight of the compound. Note that the value of atomic weight may differ slightly from different sources.

CALCULATION PROCEDURE: Dimethyl dicarbonate ((CH₃OCO)₂O) Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Dimethyl dicarbonate molecule.
From the chemical formula, you will know different atoms and their number in a Dimethyl dicarbonate molecule. Chemical formula of Dimethyl dicarbonate is C₄H₆O₅. From the chemical formula of Dimethyl dicarbonate, you can find that one molecule of Dimethyl dicarbonate has four Carbon (C) atoms, six Hydrogen (H) atoms and five Oxygen (O) atoms.

Step 2: Find out atomic weights of each atom (from 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)

Step 3: Calculate the total weight of each atom present in a Dimethyl dicarbonate molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Dimethyl dicarbonate: 4
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Dimethyl dicarbonate: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in Dimethyl dicarbonate: 6
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Dimethyl dicarbonate: 1.008 x 6 = 6.048

Number of Oxygen atoms in Dimethyl dicarbonate: 5
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Dimethyl dicarbonate: 15.9994 x 5 = 79.997

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

Molecular weight of Dimethyl dicarbonate: 48.0428 (Carbon) + 6.048 (Hydrogen) + 79.997 (Oxygen) = 134.0878

So the molecular weight of Dimethyl dicarbonate is 134.0878.

Dimethyl dicarbonate ((CH₃OCO)₂O) Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Pubchem-Hydrogen : https://pubchem.ncbi.nlm.nih.gov/element/Hydrogen 
• Jlab-ele006; https://education.jlab.org/itselemental/ele006.html
• Pubchem-6: https://pubchem.ncbi.nlm.nih.gov/element/6
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Pubchem-8: https://pubchem.ncbi.nlm.nih.gov/element/8

See also:

• Apiose (C5H10O5) Molecular Weight Calculation