The molecular weight of Rubidium Chloride (RuCl) is 120.9205.
To calculate molecular weight of any compound, the first step is to know the constituent elements (atoms) and their number in that particular compound. Then calculate the total atomic weight of each element by multiplying its atomic weight by its number. The sum of total atomic weight of all constituent elements will be the molecular weight of the compound. Note that the value of atomic weight may differ from different sources.
CALCULATION PROCEDURE
Step 1: Find out the chemical formula and determine constituent atoms and their number in a Rubidium Chloride molecule.
From the chemical formula, you will know different atoms and their number in a Rubidium chloride molecule. Chemical formula of Rubidium chloride is RuCl. From the chemical formula of Rubidium chloride, it is easy to find out that there are one Rubidium (Ru) atom and one Chlorine (Cl) atom in a molecule of Rubidium chloride.
Step 2: Find out atomic weights of each atom (from periodic table).
Atomic weight of Rubidium (Ru): 85.4678 (Ref: Pubchem-Rubidium, Ciaaw-rubidium)
Atomic weight of Chlorine (Cl): 35.4527 (Ref: Pubchem-Chlorine)
Step 3: Calculate the molecular weight of Rubidium chloride by adding the total weight of all atoms.
Number of Rubidium atoms in Rubidium chloride: 1
Atomic weight of Rubidium: 85.4678
Total weight of Rubidium atoms in Rubidium chloride: 85.4678 x 1 = 85.4678
Number of Chlorine atoms in Rubidium chloride: 1
Atomic weight of Chlorine: 35.4527
Total weight of Chlorine atoms in Rubidium chloride: 35.4527 x 1 = 35.4527
Step 4: Calculate the molecular weight of Rubidium chloride by adding up the total weight of all atoms.
Molecular weight of Rubidium chloride (RuCl):
85.4678 (Rubidium) + 35.4527 (Chlorine)
So the molecular weight of Rubidium chloride is 120.9205.
| Molecular weight of Rubidium chloride (RuCl) | |||
| Atoms (elements) in Rubidium chloride | Number of each atom in Rubidium chloride | Atomic weight | Total weight |
| Ru (Rubidium) | 1 | 85.4678 | 85.4678 (85.4678 x 1) |
| Cl (Chlorine) | 1 | 35.4527 | 35.4527 (35.4527 x 1) |
| Molecular weight of Rubidium chloride (RuCl): | 120.9205 | ||
REFERENCES:
- jlab-ele017: https://education.jlab.org/itselemental/ele017.html
- Ciaaw-rubidium : https://www.ciaaw.org/rubidium.htm
- Pubchem-Chlorine: https://pubchem.ncbi.nlm.nih.gov/element/Chlorine
- Pubchem-Rubidium : https://pubchem.ncbi.nlm.nih.gov/element/Rubidium
