Na2SO4 (Sodium Sulfate) Molar Mass

Na2SO4 (Sodium Sulfate) Molar Mass

Find the Molar Mass of Sodium Sulfate, Na2SO4 Step-by-Step

There are 4 easy steps to find the molar mass of Na2SO4 based on its chemical formula.

1. Count The Number of Each Atom

The first step to finding the molar mass of Sodium Sulfate is to count the number of each atom present in a single molecule using the chemical formula, Na2SO4:
ElementNumber of Atoms
Na (Sodium)2
S (Sulphur/Sulfur)1
O (Oxygen)4

2. Find Atomic Mass of Each Element

Next, using the periodic table, find the atomic mass in g/mol of each element (the molar mass of an element is equal to its atomic mass):
Molar Mass (g/mol)
Na (Sodium)22.98976928
S (Sulphur/Sulfur)32.065
O (Oxygen)15.9994

3. Compute Mass of Each Element

Multiply the number of atoms by the atomic weight of each element found in steps 1 and 2 to get the mass of each element in Na2SO4:
Molar Mass (g/mol)
Na (Sodium)2 × 22.98976928 = 45.97953856
S (Sulphur/Sulfur)1 × 32.065 = 32.065
O (Oxygen)4 × 15.9994 = 63.9976

4. Sum Each Element's Mass

Finally, add together the total mass of each element to get the molar mass of Na2SO4:
45.97953856 g/mol + 32.065 g/mol + 63.9976 g/mol = 142.04213856 g/mol

5. Find Mole Fraction

To find the mole fraction and percentage of each element in Na2SO4, divide each total from step 3 by the total molar mass found in step 4:
Mole FractionPercent
Na (Sodium)45.97953856 ÷ 142.04213856 = 0.323704× 100 = 32.3704%
S (Sulphur/Sulfur)32.065 ÷ 142.04213856 = 0.225743× 100 = 22.5743%
O (Oxygen)63.9976 ÷ 142.04213856 = 0.450554× 100 = 45.0554%

Molecular Weight of Na2SO4

142.0421 g/mol

The molar mass and molecular weight of Na2SO4 is 142.042.
Edit Elemental Percent Composition

Convert Na2SO4 From Moles to Grams

Moles mol

Convert Na2SO4 From Grams to Moles and Molecules

Weight g

Composition of Sodium Sulfate - Na2SO4

Element Symbol Atomic Mass # of Atoms Mass Percent
Sodium Na 45.9795 g/mol 2 32.3704%
Sulphur/Sulfur S 32.065 g/mol 1 22.5743%
Oxygen O 63.9976 g/mol 4 45.0554%
Sodium Sulfate Element Mass PercentOxygen63.9976gOxygen63.9976gSodium45.9795gSodium45.9795gSulphur/Sulfur32.065gSulphur/Sulfur32.065g Na2SO4 # of AtomsOxygen4Oxygen4Sodium2Sodium2Sulphur/Sulfur1Sulphur/Sulfur1

Instructions

This program determines the molecular mass of a substance. Enter the molecular formula of the substance. It will calculate the total mass along with the elemental composition and mass of each element in the compound.

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Finding Molar Mass

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