Actinium(III) Oxide [Ac2O3] Molecular Weight Calculation

The molecular weight of Actinium(III) oxide [Ac2O3] is 501.9982.

Actinium(III) oxide [Ac2O3] is an inorganic compound of two elements: Actinium (Ac) and Oxygen (O). The molecular weight of Actinium(III) oxide is 501.9982 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Actinium and Oxygen.

CALCULATION PROCEDURE: Actinium(III) oxide [Ac2O3] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Actinium(III) oxide molecule.
You will know different atoms and their number in an Actinium(III) oxide molecule from the chemical formula. The chemical formula of Actinium(III) oxide is [Ac2O3]. From the chemical formula, you can find that one molecule of Actinium(III) oxide has two Actinium (Ac) atoms and three Oxygen (O) atoms.

Step 2: Find out the atomic weights of each atom (from the periodic table).

Atomic weight of Actinium (Ac): 227 (Ref: Jlab-ele089, Lanl-89, Nist-89)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the total weight of each atom in an Actinium(III) oxide molecule by multiplying its atomic weight by its number.

Number of Actinium (Ac) atoms in Actinium(III) oxide: 2
Atomic weight of Actinium (Ac): 227
Total weight of Actinium(III) atoms in Actinium(III) oxide: 227 x 2 = 454

Number of Oxygen atoms in Actinium(III) oxide: 3
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Actinium(III) oxide: 15.9994 x 3 = 47.9982

Step 4: Calculate the molecular weight of Actinium(III) oxide by adding up the total weight of all atoms.

Molecular weight of Actinium(III) oxide: 454 (Actinium) + 47.9982 (Oxygen) = 501.9982

So the molecular weight of Actinium(III) oxide is 501.9982.

Actinium(III) oxide [Ac2O3] Molecular Weight Calculation

REFERENCES:

• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Jlab-ele089: https://education.jlab.org/itselemental/ele089.html
• Lanl-89: https://periodic.lanl.gov/89.shtml
• Nist-89: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=89
• Lanl-89: https://periodic.lanl.gov/89.shtml