The molecular weight of 5-Methylbenzoxazole (C₈H₇NO) is 133.14774.

5-Methylbenzoxazole (C₈H₇NO) is an organic compound of four elements: Carbon, Hydrogen, Nitrogen, and Oxygen. The molecular weight of 5-Methylbenzoxazole is 133.14774 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: 5-Methylbenzoxazole  [C₈H₇NO] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a 5-Methylbenzoxazole molecule.
You will know different atoms and their number in a 5-Methylbenzoxazole molecule from the chemical formula. The chemical formula of 5-Methylbenzoxazole is C₈H₇NO. From the chemical formula, you can find that one molecule of 5-Methylbenzoxazole consists of eight Carbon (C) atoms, seven Hydrogen (H) atoms, 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 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-Methylbenzoxazole molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in 5-Methylbenzoxazole: 8
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in 5-Methylbenzoxazole: 12.0107 x 8 = 96.0856

Number of Hydrogen atoms in 5-Methylbenzoxazole: 7
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in 5-Methylbenzoxazole: 1.008 x 7 = 7.056

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

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

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

Molecular weight of 5-Methylbenzoxazole: 96.0856 (Carbon) + 7.056 (Hydrogen) + 14.00674 (Nitrogen) + 15.9994 (Oxygen) = 133.14774

So the molecular weight of 5-Methylbenzoxazole is 133.14774.

5-Methylbenzoxazole [C₈H₇NO] 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

See also:

• Hydrogen chloride molecular weight calculation