The molecular weight of Propylene (C_{3}H_{6}) is 42.0801.

Propylene (C_{3}H_{6}) is an organic compound of two elements: Carbon, and Hydrogen. The molecular weight of Propylene is 42.0801 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Propylene [C**_{3}H_{6}] Molecular Weight Calculation

_{3}H

_{6}] Molecular Weight Calculation

**Step 1: Find the chemical formula and determine constituent atoms and their number in a Propylene molecule.**You will know different atoms and their number in a Propylene molecule from the chemical formula. The chemical formula of Propylene is C

_{2}H

_{4}. The chemical formula shows that one Propylene molecule consists of three Carbon (C) atoms and six Hydrogen (H) atoms.

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

Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)

Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)

**Step 3: Calculate the total weight of each atom in a Propylene molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Propylene: 3

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Propylene: 12.0107 x 3 = 36.0321

Number of Hydrogen atoms in Propylene: 6

Atomic weight of Hydrogen (H): 1.008

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

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

Molecular weight of Propylene: 36.0321 (Carbon) + 6.048 (Hydrogen) = 42.0801

So the molecular weight of Propylene is 42.0801.

Propylene [C_{3}H_{6}] Molecular Weight Calculation

Molecular weight of Propylene [C_{3}H_{6}] | |||

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

Carbon (C) | 3 | 12.0107 | 36.0321 |

Hydrogen (H) | 6 | 1.008 | 6.048 |

Molecular weight of Propylene [C_{3}H_{6}]: | 42.0801 |

## REFERENCES:

- Lanl-1: https://periodic.lanl.gov/1.shtml
- Jlab-ele006: https://education.jlab.org/itselemental/ele006.html