The molecular weight of Pentene (C₅H₁₀) is 70.1335.

Pentene (C₅H₁₀) 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  [C₅H₁₀] 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 C₅H₁₀. 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 [C₅H₁₀] Molecular Weight Calculation

REFERENCES:

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

See also:

• Hydrogen chloride molecular weight calculation