The molecular weight of tert-Butyl hydroperoxide [(CH₃)₃COOH] is 90.1216.

To calculate molecular weight of any compound, the first step is to know the constituent atoms and their number in that particular compound. Then calculate the total weight of each atom by multiplying its atomic weight by its number. The sum of total weight of all constituent atoms will be the molecular weight of the compound. Note that the value of atomic weight may differ slightly from different sources.

CALCULATION PROCEDURE: tert-Butyl hydroperoxide [(CH₃)₃COOH] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a tert-Butyl hydroperoxide molecule.
From the chemical formula, you will know different atoms and their number in a tert-Butyl hydroperoxide molecule. Chemical formula of tert-Butyl hydroperoxide is C₄H₁₀O₂. From the chemical formula of tert-Butyl hydroperoxide, you can find that one molecule of tert-Butyl hydroperoxide has four Carbon (C) atoms, ten Hydrogen (H) atoms and two Oxygen (O) atoms.

Step 2: Find out atomic weights of each atom (from 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 Oxygen (O) : 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the total weight of each atom present in a tert-Butyl hydroperoxide molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in tert-Butyl hydroperoxide: 4
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in tert-Butyl hydroperoxide: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in tert-Butyl hydroperoxide: 10
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in tert-Butyl hydroperoxide: 1.008 x 10 = 10.08

Number of Oxygen atoms in tert-Butyl hydroperoxide: 1
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in tert-Butyl hydroperoxide: 15.9994 x 2 = 31.9988

Step 4: Calculate the molecular weight of tert-Butyl hydroperoxide by adding up the total weight of all atoms.

Molecular weight of tert-Butyl hydroperoxide: 48.0428 (Carbon) + 10.08 (Hydrogen) + 31.9988 (Oxygen) = 90.1216

So the molecular weight of tert-Butyl hydroperoxide is 90.1216.

tert-Butyl hydroperoxide [(CH₃)₃COOH] Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Pubchem-Hydrogen : https://pubchem.ncbi.nlm.nih.gov/element/Hydrogen 
• Jlab-ele006; https://education.jlab.org/itselemental/ele006.html
• Pubchem-6: https://pubchem.ncbi.nlm.nih.gov/element/6
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Pubchem-8: https://pubchem.ncbi.nlm.nih.gov/element/8

See also:

• Apiose (C5H10O5) Molecular Weight Calculation