1. Find the Molar Mass of Each Element

* Na (Sodium): 22.99 g/mol

* S (Sulfur): 32.06 g/mol

* O (Oxygen): 16.00 g/mol

2. Calculate the Molar Mass of Na₂SO₄

* 2 Na atoms * 22.99 g/mol = 45.98 g/mol

* 1 S atom * 32.06 g/mol = 32.06 g/mol

* 4 O atoms * 16.00 g/mol = 64.00 g/mol

* Total molar mass: 45.98 + 32.06 + 64.00 = 142.04 g/mol

3. Calculate the Percent Composition of Each Element

* Na: (45.98 g/mol / 142.04 g/mol) * 100% = 32.37%

* S: (32.06 g/mol / 142.04 g/mol) * 100% = 22.57%

* O: (64.00 g/mol / 142.04 g/mol) * 100% = 45.06%

Therefore, the percent composition of Na₂SO₄ is:

* Na: 32.37%

* S: 22.57%

* O: 45.06%