FeS2 Molar Mass (With Calculations)

Molar mass of FeS2 is 119.965 g/mol.

Well, now you have come to know the molar mass of FeS2.

But how can you get this value?

Let me show you the calculation to get the molar mass of FeS2.

You can also refer to this one minute video which will show you the simple steps to calculate the molar mass of any compounds.

FeS2 Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of FeS2.

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 FeS2.

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 FeS2, there is 1 Iron atom and 2 Sulfur atoms.

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

You can see that;

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

The molar mass of Sulfur is 32.06 g/mol. ^[2]

Now, to calculate the molar mass of FeS2, you just have to add the molar mass of all the individual atoms that are present in FeS2.

You can see that in FeS2, there is 1 Iron atom and 2 Sulfur atoms.

So, Molar mass of FeS2 = Molar mass of 1 Iron (Fe) atom + Molar mass of 2 Sulfur (S) atoms.
= 55.845 + (32.06) 2
= 55.845 + 64.12
= 119.965 g/mol

Hence the Molar mass of FeS2 is 119.965 g/mol.

I hope you have understood the short and simple calculation for finding the molar mass of FeS2.

Remember

• 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;
MgCl2 · 6H2O Molar Mass
MgI2 (Magnesium iodide) Molar Mass
Hg2Cl2 Molar Mass
CaSO4 · 2H2O Molar Mass
K2HPO4 Molar Mass