The molecular weight of Mannitol [C₆H₁₄O₆] is 182.1726.

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: Mannitol [C₆H₁₄O₆] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Mannitol molecule.
From the chemical formula, you will know different atoms and their number in a Mannitol molecule. Chemical formula of Mannitol is C₆H₆O₂. From the chemical formula of Mannitol, you can find that one molecule of Mannitol has six Carbon (C) atoms, six 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 Mannitol molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Mannitol: 6
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Mannitol: 12.0107 x 6 = 72.0642

Number of Hydrogen atoms in Mannitol: 14
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Mannitol: 1.008 x 14 = 14.112

Number of Oxygen atoms in Mannitol: 6
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Mannitol: 15.9994 x 6 = 95.9964

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

Molecular weight of Mannitol: 72.0642 (Carbon) + 14.112 (Hydrogen) + 95.9964 (Oxygen) = 182.1726

So the molecular weight of Mannitol is 182.1726.

Mannitol [C₆H₁₄O₆] 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