# Diacetyl Peroxide ((CH3CO2)2) Molecular Weight Calculation

The molecular weight of Diacetyl peroxide ((CH3CO2)2) is 118.0884.

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: Diacetyl peroxide ((CH3CO2)2) Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Diacetyl peroxide molecule.
From the chemical formula, you will know different atoms and their number in a Diacetyl peroxide molecule. Chemical formula of Diacetyl peroxide is C4H6O4. From the chemical formula of Diacetyl peroxide, you can find that one molecule of Diacetyl peroxide has four Carbon (C) atoms, six Hydrogen (H) atoms and four 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 Diacetyl peroxide molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Diacetyl peroxide: 4
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Diacetyl peroxide: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in Diacetyl peroxide: 6
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Diacetyl peroxide: 1.008 x 6 = 6.048

Number of Oxygen atoms in Diacetyl peroxide: 4
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Diacetyl peroxide: 15.9994 x 4 = 63.9976

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

Molecular weight of Diacetyl peroxide: 48.0428 (Carbon) + 6.048 (Hydrogen) + 63.9976 (Oxygen) = 118.0884

So the molecular weight of Diacetyl peroxide is 118.0884.

Diacetyl peroxide ((CH3CO2)2) 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