FeCl2 Molar Mass (With Calculations)

FeCl2 Molar Mass

Molar mass of FeCl2 is 126.745 g/mol.

Well, now you have come to know the molar mass of FeCl2.

But how can you get this value?

Let me show you the calculation to get the molar mass of FeCl2.

FeCl2 Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of FeCl2.

Because the molar mass of any molecule (or compound) can be calculated by simply adding the molar masses of individual atoms.

Now here we have to find the molar mass of FeCl2.

So for that, have a look at the periodic table given below.

You can see the molar mass value of all the atoms from this periodic table.

Now in FeCl2, there is 1 Iron atom and 2 Chlorine atoms.

So let’s look at the molar mass of Iron and Chlorine from the above periodic table.

You can see that;

The molar mass of Iron is 55.845 g/mol. [1]

The molar mass of Chlorine is 35.45 g/mol. [2]

Now, to calculate the molar mass of FeCl2, you just have to add the molar mass of all the individual atoms that are present in FeCl2.

You can see that in FeCl2, there is 1 Iron atom and 2 Chlorine atoms.

So, Molar mass of FeCl2 = Molar mass of 1 Iron (Fe) atom + Molar mass of 2 Chlorine (Cl) atoms.
= 55.845 + (35.45) 2
= 55.845 + 70.9
= 126.745 g/mol

Hence the Molar mass of FeCl2 is 126.745 g/mol.

I hope you have understood the short and simple calculation for finding the molar mass of FeCl2.


  • In some books, you may see the unit of molar mass as grams/mole or g/mole. But all these units (i.e g/mol, grams/mole and g/mole) are the same. 
  • Always follow the calculation order to avoid any mistakes in calculation. First solve the brackets, then multiplications and at last do the final addition.
  • And don’t forget to put the unit g/mol to your final calculated molar mass.

Check out other related topics for more practice;
Na2HPO4 Molar Mass
Ag2CO3 Molar Mass
MnO2 Molar Mass
Potassium phosphate Molar Mass
FeSO4 Molar Mass


Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. With a desire to make learning accessible for everyone, he founded Knords Learning, an online learning platform that provides students with easily understandable explanations.

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