Empirical and Molecular Formula

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.

• SO
• SO2
• SO3
• SO4

The empirical formula of a compound is CH₂O and it has a molecular molar mass is 180.20g? What is the molecular formula?

• CH₂O

• C₂H₄O₂

• C₄H₈O₄

• C₆H₁₂O₆

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

•  NaPO2
• Na2PO3
• Na3PO4
• NaPO4

A compound has the empirical formula of K₂SO₄ and a molecular mass of 696g. What is the molecular formula?

• K₂SO₄

• K₈SO₁₆

• K₈S₄O₈

• K₈S₄O₁₆

What is the molecular formula of glycerol that has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O.

• C₂H₃O₂

• CH₂O

• C₂H₄O₂

• C₃H₈O₃