The molecular weight of Propylene carbonate (C_{4}H_{6}O_{3}) is 102.089.

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: Propylene carbonate (C**_{4}H_{6}O_{3}) Molecular Weight Calculation

_{4}H

_{6}O

_{3}) Molecular Weight Calculation

**Step 1: Find out the chemical formula and determine constituent atoms and their number in a Propylene carbonate molecule.**From the chemical formula, you will know different atoms and their number in a Propylene carbonate molecule. Chemical formula of Propylene carbonate is C

_{4}H

_{6}O

_{3}. From the chemical formula of Propylene carbonate, you can find that one molecule of Propylene carbonate has four Carbon (C) atoms, six Hydrogen (H) atoms and three 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 Propylene carbonate molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Propylene carbonate: 4

Atomic weight of Carbon: 12.0107

Total weight of Carbon atoms in Propylene carbonate: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in Propylene carbonate: 6

Atomic weight of Hydrogen: 1.008

Total weight of Hydrogen atoms in Propylene carbonate: 1.008 x 6 = 6.048

Number of Oxygen atoms in Propylene carbonate: 3

Atomic weight of Oxygen: 15.9994

Total weight of Oxygen atoms in Propylene carbonate: 15.9994 x 3 = 47.9982

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

Molecular weight of Propylene carbonate: 48.0428 (Carbon) + 6.048 (Hydrogen) + 47.9982 (Oxygen) = 102.089

So the molecular weight of Propylene carbonate is 102.089.

Propylene carbonate (C_{4}H_{6}O_{3}) Molecular Weight Calculation

Molecular weight of Propylene carbonate | |||

Constituent atoms | Number of each atom | Atomic weight | Total weight |

Carbon (C) | 4 | 12.0107 | 48.0428 |

Hydrogen (H) | 6 | 1.008 | 6.048 |

Oxygen (O) | 3 | 15.9994 | 47.9982 |

Molecular weight of Propylene carbonate: | 102.089 |

## 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