# Carbon Dioxide [CO2] Molecular Weight Calculation

The molecular weight of Carbon dioxide [CO2] is 44.0095.

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: Carbon dioxide [CO2] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Carbon dioxide molecule.
From the chemical formula, you will know different atoms and their number in a Carbon dioxide molecule. Chemical formula of Carbon dioxide is CO2. From the chemical formula of Carbon dioxide, you can find that one molecule of Carbon dioxide has one Carbon (C) atom, and two 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 Oxygen (O) : 15.9994 (Ref: Jlab-ele008)

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

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

Number of Oxygen atoms in Carbon dioxide: 2
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Carbon dioxide: 15.9994 x 2 = 31.9988

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

Molecular weight of Carbon dioxide: 12.0107 (Carbon) + 31.9988 (Oxygen) = 44.0095

So the molecular weight of Carbon dioxide is 44.0095.

Carbon dioxide [CO2] Molecular Weight Calculation

## REFERENCES:

• 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