**Molar mass of Na2SO3 (Sodium sulfite) is ****126.037 g/mol****.**

Well, now you have come to know the molar mass of Na2SO3.

But how can you get this value?

Let me show you the calculation to get the molar mass of Na2SO3 (Sodium sulfite).

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

## Na2SO3 (Sodium sulfite) Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of Na2SO3 (Sodium sulfite).

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 Na2SO3 (Sodium sulfite).

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 Na2SO3, there are 2 Sodium atoms, 1 Sulfur atom and 3 Oxygen atoms.

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

You can see that;

The molar mass of Sodium is **22.990 g/mol**. ^{[1]}

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

The molar mass of Oxygen is **15.999 g/mol**. ^{[3]}

Now, to calculate the molar mass of Na2SO3, you just have to add the molar mass of all the individual atoms that are present in Na2SO3.

You can see that in Na2SO3, there are 2 Sodium atoms, 1 Sulfur atom and 3 Oxygen atoms.

**So, Molar mass of Na2SO3 = Molar mass of 2 Sodium (Na) atoms + Molar mass of 1 Sulfur (S) atom + Molar mass of 3 Oxygen (O) atoms.****= (22.990) 2 + 32.06 + (15.999) 3****= 45.98 + 32.06 + 47.997****= 126.037 g/mol**

**Hence the Molar mass of Na2SO3 is ****126.037 g/mol****.**

I hope you have understood the short and simple calculation for finding the molar mass of Na2SO3.

**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;**

Oxalate ion (C2O4)2- Molar Mass

Li3PO4 (Lithium phosphate) Molar Mass

Li2O (Lithium oxide) Molar Mass

PbO (Lead oxide) Molar Mass

ZnS (Zinc sulfide) 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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