Ammonia [NH3] Molecular Weight Calculation

The molecular weight of Ammonia [NH3] is 17.03074.

Ammonia [NH3] is an inorganic compound of two elements: Nitrogen and Hydrogen. The molecular weight of Ammonia is 17.03074 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Ammonia [NH3] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Ammonia molecule.
You will know different atoms and their number in an Ammonia molecule from the chemical formula. The chemical formula of Ammonia is NH3. From the chemical formula, you can find that one molecule of Ammonia consists of one Nitrogen (N) atom and three Hydrogen (H) 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)

Step 3: Calculate the total weight of each atom in an Ammonia molecule by multiplying its atomic weight by its number.

Number of Nitrogen atoms in Ammonia: 1
Atomic weight of Nitrogen (N): 14.00674
Total weight of Nitrogen atoms in Ammonia: 14.00674 x 1 = 14.00674

Number of Hydrogen atoms in Ammonia: 3
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Ammonia: 1.008 x 3 = 3.024

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

Molecular weight of Ammonia: 14.00674 (Nitrogen)+ 3.024 (Hydrogen)  = 17.03074

So the molecular weight of Ammonia is 17.03074.

Ammonia [NH3] Molecular Weight Calculation

REFERENCES:

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