# Ammonium Nitrate [NH4NO3] Molecular Weight Calculation

The molecular weight of Ammonium nitrate [NH4NO3] is 80.04368.

Ammonium nitrate [NH4NO3] is an inorganic compound of three elements: Nitrogen, Hydrogen, and Oxygen. The molecular weight of Ammonium nitrate is 80.04368 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of Nitrogen, Hydrogen, and Oxygen.

# CALCULATION PROCEDURE: Ammonium nitrate [NH4NO3] Molecular Weight Calculation

Step 1: Find the chemical formula and determine constituent atoms and their number in an Ammonium nitrate molecule.
You will know different atoms and their number in an Ammonium nitrate molecule from the chemical formula. The chemical formula of Ammonium nitrate is N2H4O3. From the chemical formula of Ammonium nitrate, you can find that one molecule of Ammonium nitrate has two Nitrogen (N) atoms, four Hydrogen (H) atoms, and three Oxygen (O) atoms.

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

Atomic weight of Nitrogen (N): 14.00674 (Ref: Jlab-ele007)
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 in an Ammonium nitrate molecule by multiplying its atomic weight by its number.

Number of Nitrogen atoms in Ammonium nitrate: 2
Atomic weight of Nitrogen (N): 14.00674
Total weight of Nitrogen atoms in Ammonium nitrate: 14.00674 x 2 = 28.01348

Number of Hydrogen atoms in Ammonium nitrate: 4
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Ammonium nitrate: 1.008 x 4 = 4.032

Number of Oxygen atoms in Ammonium nitrate: 3
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Ammonium nitrate: 15.9994 x 3 = 47.9982

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

Molecular weight of Ammonium nitrate: 28.01348 (Nitrogen) + 4.032 (Hydrogen) + 47.9982 (Oxygen) = 80.04368

So the molecular weight of Ammonium nitrate is 80.04368.

Ammonium nitrate [NH4NO3] Molecular Weight Calculation

## REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Jlab-ele007: https://education.jlab.org/itselemental/ele007.html