The molecular weight of Acetic formic anhydride [H3C(CO)O(CO)H] is 88.0623.

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: Acetic formic anhydride [H3C(CO)O(CO)H] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Acetic formic anhydride molecule.
From the chemical formula, you will know different atoms and their number in a Acetic formic anhydride molecule. Chemical formula of Acetic formic anhydride is C₃H₄O₃. From the chemical formula of Acetic formic anhydride, you can find that one molecule of Acetic formic anhydride has three Carbon (C) atoms, four Hydrogen (H) atoms and three 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 Acetic formic anhydride molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Acetic formic anhydride: 3
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Acetic formic anhydride: 12.0107 x 3 = 36.0321

Number of Hydrogen atoms in Acetic formic anhydride: 4
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Acetic formic anhydride: 1.008 x 4 = 4.032

Number of Oxygen atoms in Acetic formic anhydride: 3
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Acetic formic anhydride: 15.9994 x 3 = 47.9982

Step 4: Calculate the molecular weight of Acetic formic anhydride by adding up the total weight of all atoms.

Molecular weight of Acetic formic anhydride: 36.0321 (Carbon) + 4.032 (Hydrogen) + 47.9982 (Oxygen) = 88.0623

So the molecular weight of Acetic formic anhydride is 88.0623.

Acetic formic anhydride [H3C(CO)O(CO)H] 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