The molecular weight of Pentene (C_{5}H_{10}) is 70.1335.

Pentene (C_{5}H_{10}) is an organic compound of two elements: Carbon, and Hydrogen. The molecular weight of Pentene is 70.1335 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Pentene [C**_{5}H_{10}] Molecular Weight Calculation

_{5}H

_{10}] Molecular Weight Calculation

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

_{5}H

_{10}. The chemical formula shows that one Pentene molecule consists of five Carbon (C) atoms and ten 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 Pentene molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Pentene: 5

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Pentene: 12.0107 x 5 = 60.0535

Number of Hydrogen atoms in Pentene: 10

Atomic weight of Hydrogen (H): 1.008

Total weight of Hydrogen atoms in Pentene: 1.008 x 10 = 10.08

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

Molecular weight of Pentene: 60.0535 (Carbon) + 10.08 (Hydrogen) = 70.1335

So the molecular weight of Pentene is 70.1335.

Pentene [C_{5}H_{10}] Molecular Weight Calculation

Molecular weight of Pentene [C_{5}H_{10}] | |||

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

Carbon (C) | 5 | 12.0107 | 60.0535 |

Hydrogen (H) | 10 | 1.008 | 10.08 |

Molecular weight of Pentene [C_{5}H_{10}]: | 70.1335 |

## REFERENCES:

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