# Aluminium Nitrate Nonahydrate [Al(NO3)3.9H2O] Molecular Weight Calculation

The molecular weight of Aluminium nitrate nonahydrate [Al(NO3)3.9H2O] is 375.1349584.

Aluminium nitrate [Al(NO3)3] is an inorganic compound of three elements: Aluminium, Nitrogen, and Oxygen. The nonahydrate form of Aluminium nitrate [Al(NO3)3.9H2O] also contains 9 water molecules. The molecular weight of Aluminium nitrate nonahydrate is 375.1349584 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements and water molecules.

CALCULATION PROCEDURE: Aluminium nitrate nonahydrate [Al(NO3)3.9H2O] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Aluminium nitrate nonahydrate molecule.
From the chemical formula, you will know different atoms and their number in an Aluminium nitrate nonahydrate molecule. The chemical formula of Aluminium nitrate nonahydrate is Al(NO3)3.9H2O or AlN3O9.9H2O. From the chemical formula, you can find that one molecule of Aluminium nitrate nonahydrate has one Aluminium (Al) atom, three Nitrogen (N) atoms, nine Oxygen (O) atoms, and nine water molecules.

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

Atomic weight of Aluminium (Al): 26.9815384 (Ref: ciaaw-aluminium)
Atomic weight of Nitrogen (N): 14.00674 (Ref: Jlab-ele007)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)
Molecular weight of Water [H2O]: 18.0154

Step 3: Calculate the molecular weight of Aluminium nitrate nonahydrate by adding the total weight of all atoms.

Number of Aluminium (Al) atoms in Aluminium nitrate nonahydrate: 1
Atomic weight of Aluminium: 26.9815384
Total weight of Aluminium atoms in Aluminium nitrate nonahydrate: 26.9815384 x 1 = 26.9815384

Number of Nitrogen (N) atoms in Aluminium nitrate nonahydrate: 3
Atomic weight of Nitrogen: 14.00674
Total weight of Nitrogen atoms in Aluminium nitrate nonahydrate: 14.00674 x 3 = 42.02022

Number of Oxygen (O) atoms in Aluminium nitrate nonahydrate: 9
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Aluminium nitrate nonahydrate: 15.9994 x 9 = 143.9946

Number of water (H2O) molecules in Aluminium nitrate nonahydrate: 9
Molecular weight of water: 18.0154
Total weight of water in Aluminium nitrate nonahydrate: 18.0154 x 9 = 162.1386

Step 4: Calculate the molecular weight of Aluminium nitrate nonahydrate by adding up the total weight of all atoms.

Molecular weight of Aluminium nitrate nonahydrate [Al(NO3)3.9H2O]: 26.9815384 (Aluminium) + 42.02022 (Nitrogen) + 143.9946 (Oxygen) + 162.1386 (Water) = 375.1349584

So the molecular weight of Aluminium nitrate nonahydrate is 375.1349584.

Aluminium nitrate nonahydrate [Al(NO3)3.9H2O] Molecular Weight Calculation

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