The molecular weight of 5-Chlorobenzoxazole (C₇H₄ClNO) is 153.56574.

5-Chlorobenzoxazole (C₇H₄ClNO) is an organic compound of five elements: Carbon, Hydrogen, Chlorine, Nitrogen, and Oxygen. The molecular weight of 5-Chlorobenzoxazole is 153.56574 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: 5-Chlorobenzoxazole  [C₇H₄ClNO] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a 5-Chlorobenzoxazole molecule.
You will know different atoms and their number in a 5-Chlorobenzoxazole molecule from the chemical formula. The chemical formula of 5-Chlorobenzoxazole is C₇H₄ClNO. From the chemical formula, you can find that one molecule of 5-Chlorobenzoxazole consists of seven Carbon (C) atoms, four Hydrogen (H) atoms, one Chlorine atom, one Nitrogen (N) atom, and one Oxygen atom.

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)
Atomic weight of Chlorine (Cl): 35.4527 (Ref: jlab-ele017)
Atomic weight of Nitrogen (N): 14.00674 (Ref: Jlab-ele007)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the total weight of each atom in a 5-Chlorobenzoxazole molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in 5-Chlorobenzoxazole: 7
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in 5-Chlorobenzoxazole: 12.0107 x 7 = 84.0749

Number of Hydrogen atoms in 5-Chlorobenzoxazole: 4
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in 5-Chlorobenzoxazole: 1.008 x 4 = 4.032

Number of Chlorine atoms in 5-Chlorobenzoxazole: 1
Atomic weight of Chlorine (Cl): 35.4527
Total weight of Chlorine atoms in 5-Chlorobenzoxazole: 35.4527 x 1 = 35.4527

Number of Nitrogen atoms in 5-Chlorobenzoxazole: 1
Atomic weight of Nitrogen (N): 14.00674
Total weight of Nitrogen atoms in 5-Chlorobenzoxazole: 14.00674 x 1 = 14.00674

Number of Oxygen atoms in 5-Chlorobenzoxazole: 1
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in 5-Chlorobenzoxazole: 15.9994 x 1 = 15.9994

Step 4: Calculate the molecular weight of 5-Chlorobenzoxazole by adding up the total weight of all atoms.

Molecular weight of 5-Chlorobenzoxazole: 84.0749 (Carbon) + 4.032 (Hydrogen) + 35.4527 (Chlorine) + 14.00674 (Nitrogen) + 15.9994 (Oxygen) = 153.56574

So the molecular weight of 5-Chlorobenzoxazole is 153.56574.

5-Chlorobenzoxazole [C₇H₄ClNO] Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Jlab-ele006: https://education.jlab.org/itselemental/ele006.html 
• Jlab-ele007: https://education.jlab.org/itselemental/ele007.html
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Pubchem-Chlorine: https://pubchem.ncbi.nlm.nih.gov/element/Chlorine

See also:

• Hydrogen chloride molecular weight calculation