PERCENT COMPOSITION CP

A sample of a compound contains 24 grams of carbon and 64 grams of oxygen. What is the empirical formula of this compound?

• CO

• C₂O₂

• C₂O₄

• CO₂

What is the empirical formula of a compound with a composition of 50.% sulfur and 50.% oxygen by mass?

• S₂O₃

• SO₃

• SO₂

• SO

A compound consists of 25.9% nitrogen and 74.1% oxygen by mass. What is the empirical formula of the compound?

• N₂O

• NO

• NO₂

• N₂O₅

What is the molecular formula of a compound with the empirical formula P₂O₅ and a gram molecular mass of 284 grams?

• P₁₀O₄

• P₄O₁₀

• P₂O₅

• P₅O₂

Which pair consists of a molecular formula and its corresponding empirical formula?

• SO₂ and SO₃

• C₂H₂ and CH₃CH₃

• C₆H₆ and C₂H₂

• P₄O₁₀ and P₂O₅

What is the empirical formula of a compound with the molecular formula C₆H₁₂Cl₂O₂?

• CH₂ClO

• C₆H₁₂Cl₂O₂

• CHClO

• C₃H₆ClO

The molecular formula and the empirical formula of this hydrocarbon are —

• C₄H₈ and CH₂.

• C₅H₁₀ and CH₃.

• C₅H₁₀ and CH₂.

• C₄H₈ and CH₃.

The empirical formula for a molecule —

• shows the most basic integer ratio of each type of element in the molecule

• shows the total number of atoms of each type of element in the molecule

• shows only the total number of atoms in the molecule

• shows only the position of each atom in the molecule

A 16.0-gram sample of a compound containing only copper and sulfur is decomposed to produce 12.8 grams of copper and 3.2 grams of sulfur. What is the empirical formula of this compound?

• Cu₂S

• Cu₃S

• Cu₂S₂

• Cu₂S₃

What is the empirical formula of a compound that contains 85% Ag and 15% F by mass?

• AgF

• Ag₂F₂

• Ag₂F

• Ag₂F₂