Empirical Formula

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

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

• NaPO₂

• Na₂PO₃

• Na₃PO₄

• NaPO₄

A sample contains 36.95 g of mercury (Hg) and 13.05 g of chlorine (Cl). What is the empirical formula for this compound?

• HgCl₂

• Hg₃Cl

• Hg₁₇Cl₃₆

• HgCl

A compound is 56.58% K, 8.69% C, and 34.73% O by mass. What is its empirical formula.

• KCO

• K₂CO

• KCO₃

• K₂CO₃

A compound is 16.3% C, 32.1% Cl and 51.6% F by mass. What is the empirical formula?

• C₃Cl₂F₆

• C_1.5Cl F₃

• C₂Cl₃F₆

• C₃Cl₆F₂

Whats the empirical formula of a molecule containing 18.7% of Lithium, 16.3% of Carbon and 65.0% of oxygen?

• CO₂Li₃
• Li₂CO₃
• Li₃CO₂
• LiCO₅