The molecular weight of Hydroxyacetone [CH₃COCH₂OH] is 74.0789.

Hydroxyacetone (CH₃COCH₂OH) is an organic compound of three elements: Carbon, Hydrogen, and Oxygen. The molecular weight of Hydroxyacetone is 74.0789 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Hydroxyacetone [CH₃COCH₂OH] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Hydroxyacetone molecule.
You will know different atoms and their number in a Hydroxyacetone molecule from the chemical formula. The chemical formula of Hydroxyacetone is C₃H₆O₂. From the chemical formula, you can find that one molecule of Hydroxyacetone has three Carbon (C) atoms, six Hydrogen (H) atoms, and two Oxygen (O) 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)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

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

Number of Carbon atoms in Hydroxyacetone: 3
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Hydroxyacetone: 12.0107 x 3 = 36.0321

Number of Hydrogen atoms in Hydroxyacetone: 6
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Hydroxyacetone: 1.008 x 6 = 6.048

Number of Oxygen atoms in Hydroxyacetone: 2
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Hydroxyacetone: 15.9994 x 2 = 31.9988

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

Molecular weight of Hydroxyacetone: 36.0321 (Carbon) + 6.048 (Hydrogen) + 31.9988 (Oxygen) = 74.0789

So the molecular weight of Hydroxyacetone is 74.0789.

Hydroxyacetone [CH₃COCH₂OH] 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