Empirical and Molecular Formula Concept

Which pair has the same empirical formula?

• NaCrO₄ and Na₂Cr₂O₇
• C₂H₄O₂ and C₆H₁₂O₆
• C₃H₆O₃ and C₂H₆O₂
• CH₄ and C₂H₆

Which one is an empirical formula?

• H₂O₂
• C₂H₆O₁₂
• CaCl₂
• N₂O₈

The chemical compound butane is pictured here. If the black spheres represent carbon, and the white represent hydrogen, what is the molecular formula for butane?

• C₁₀H₄

• C₄H₁₀

• C₅H₂

• C₂H₅

The chemical compound butane is pictured here. If the black spheres represent carbon, and the white represent hydrogen, what is the empirical formula for butane?

• C₁₀H₄

• C₄H₁₀

• C₅H₂

• C₂H₅

C₄H₆

What is the correct empirical formula for this compound?

• CH

• CH₃

• C₂H₃

• C₄H₆

C₂H₄

What is the correct empirical formula for this compound?

• CH

• CH₂

• C₄H₂

• C₂H₄

N₂S₃

What is the correct empirical formula for this compound?

• NS

• N₃S₂

• N₂S₃

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

• ionic formula
• covalent formula
• empirical formula
• molecular formula

An empirical formula:

• is a formula that calculates the coefficients of a compound in a balanced equation.
• is the simplest whole-number ratio of moles of elements in the compound.

Which of the following is considered an empirical formula?

• CH₃COOH

• C₆H₁₂O₆

• H₂O

• Mg₂Cl₄