Empirical Formula Practice

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

• SO
• SO₂
• SO₃
• SO₄

What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?

• C₃H₈
• CH₄
• C₂H₂
• C₄H₁₀

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

• NaPO₂
• Na₂PO₃
• Na₃PO₄
• NaPO₄

What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?

• NO
• N₂O₃
• N₂O₄
• N₂O₅

What is the empirical formula if you have 35.98% aluminum and 64.02% sulfur?

• AlS

• Al₂S

• AlS₂

• Al₂S₃

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

• C₂H₃O₂
• CH₂O
• C₂H₄O₂
• C₃H₈O₃