Empirical and Molecular

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

• CO₂Li₃

• Li₂CO₃

• Li₃CO₂

• LiCO₅

S₂O₈ What is the empirical formula?

• S₂O₈

• SO

• SO₄

• S₈O₂

A compound has the empirical formula CH. The molecular mass is found to be somewhere between 75 - 80 g/mol. What is the molecular formula of the compound?

• C₂H₂

• C₃H₃

• C₅H₅

• C₆H₆

A compound has the molecular formula C₁₂H₂₄O₆. What is the empirical formula of this compound?

• CHO

• C₂H₄O

• C₆H₁₂O

• CH₂O

A compound has the molar mass of 170.0 g/mol and an empirical formula of SiF₃. The compounds molecular formula is

• SiF₃

• Si₂F₆

• Si₅F₁₅

• Si₄F₁₂

What is the empirical formula of the following molecular formula:  C₃H₆

• C₃H₆

• CH₂

• C₂H₄

• CH₃

Which one is empirical?

• H₂O₂

• C₂H₆O₁₂

• CaCl₂

• N₂O₈

What is the empirical formula for a compound containing the following ratio:
3Na:1P:4O

• NaPO₄

• Na₃P₄O

• Na₃PO₄

• NaPO

Tags

NGSS.MS-PS1-1

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

• NO

• N₂O₃

• N₂O₄

• N₂O₅

A compound is composed of 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula of the compound?