Module 3.4 Empirical Formula

Question 1

What is the Empirical Formula for

32. 37% Na
33. 58% S
34. 05% O

Answer 1

Use periodic table to find the mass and divide by the % 
Na 32.37% / 22.99 = 1.408
S 22.58% / 32.06 = 0.704
O 45.05% / 16 = 2.816
Select the smallest number (0.704) and divide by each of the other numbers
Na = 1.408 / 0.704 = 2
S = 0.704 / 0.704 = 1
O = 2.816 / 0.704 = 4
Write out the substance

Na₂SO₄