Writing Empirical and Molecular Formulas

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

What is the empirical formula for the following molecular formula: C₆H₁₄

• C₆H₁₄
• C₃H₇
• CH₂
• CH₃

What is the molecular formula if the empirical formula is C₂H₅ and the molecular molar mass is 58.14 g/mol?

• C₂H₅
• C₄H₁₀
• C₁H_2.5
• C₄H₈

What is the empirical formula for the following molecular formula: C₅H₁₂

• C₅H₁₂
• CH₃
• CH₂
• C_2.5H₆

Find the percent composition of N₂S₂.

• N: 69.6%  S: 30.4%
• N:36% S: 75.6%
• N: 96.6% S: 3.4%
• N: 30.4% S: 69.6%

What is the molecular formula for a compound with the empirical formula: K₂SO₄ and a molecular mass of 696g.

• K₂SO₄ 
• K₈SO₁₆
• K₈S₄O₈ 
• K₈S₄O₁₆ 

What is the molecular formula for a compound with the empirical formula: CaCl₂  and a molecular mass of 330g.

• Ca₂Cl₄
• Ca₃Cl₆
• Ca₃Cl₉
• Ca₃Cl₅

C₄H₁₀

• Empirical
• Molecular

C₆H₁₂O₆

• Empirical
• Molecular

What is the empirical formula for the following molecular formula: C₅H₁₂

• C₅H₁₂
• CH₃
• CH₂
• C_2.5H₆