The molecular weight of Isomaltose (C₁₂H₂₂O₁₁) is 342.2978.

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: Isomaltose (C₁₂H₂₂O₁₁) Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Isomaltose molecule.
From the chemical formula, you will know different atoms and their number in a Isomaltose molecule. Chemical formula of Isomaltose is C₁₂H₂₂O₁₁. From the chemical formula of Isomaltose, you can find that one molecule of Isomaltose have twelve Carbon (C) atoms, twenty two Hydrogen (H) atoms and eleven 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 Isomaltose molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Isomaltose: 12
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Isomaltose: 12.0107 x 12 = 144.1284

Number of Hydrogen atoms in Isomaltose: 22
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Isomaltose: 1.008 x 22 = 22.176

Number of Oxygen atoms in Isomaltose: 11
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Isomaltose: 15.9994 x 11 = 175.9934

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

Molecular weight of Isomaltose: 144.1284 (Carbon) + 22.176 (Hydrogen) + 175.9934 (Oxygen) = 342.2978

So the molecular weight of Isomaltose is 342.2978.

Isomaltose (C₅H₁₀O₅) 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