K2S (Potassium sulfide) Molar Mass (With Calculations)

K2S (Potassium sulfide) Molar Mass

Molar mass of K2S (Potassium sulfide) is 110.256 g/mol.

Well, now you have come to know the molar mass of K2S.

But how can you get this value?

Let me show you the calculation to get the molar mass of K2S (Potassium sulfide).

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

K2S (Potassium sulfide) Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of K2S.

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 K2S (Potassium sulfide).

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 K2S, there are 2 Potassium atoms and 1 Sulfur atom.

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

You can see that;

The molar mass of Potassium is 39.098 g/mol. [1]

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

Now, to calculate the molar mass of K2S, you just have to add the molar mass of all the individual atoms that are present in K2S.

You can see that in K2S, there are 2 Potassium atoms and 1 Sulfur atom.

So, Molar mass of K2S = Molar mass of 2 Potassium (K) atoms + Molar mass of 1 Sulfur (S) atom.
= (39.098) 2 + 32.06
= 78.196 + 32.06
= 110.256 g/mol

Hence the Molar mass of K2S is 110.256 g/mol.

I hope you have understood the short and simple calculation for finding the molar mass of K2S.


  • 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;
B2H6 (Diborane) Molar Mass
SrCO3 (Strontium carbonate) Molar Mass
LiNO3 (Lithium nitrate) Molar Mass
Cu2O Molar Mass
C14H12 (Stilbene) 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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