Empirical Formula Chemistry

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.

Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine.

• CrCl

• CrCl₃

• Cr₃Cl

• Cr₂Cl₆

A compound containing 92.3 percent carbon and 7.7 percent hydrogen. What is the empirical formula?

• CH

• CH₂

• C₂H

• C₂H₂

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

Tags

NGSS.HS-PS1-7

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

• K₂SO₄ 

• K₈SO₁₆

• K₈S₄O₈ 

• K₈S₄O₁₆ 

C₄H₆ What is the empirical formula?

• CH

• CH₃

• C₂H₃

• C₄H₆

Tags

NGSS.MS-PS1-1

Br₂O₆ What is the empirical formula?

• BrO₃

• Br₆O₂

• BrO

• Br₂O₆

Tags

NGSS.MS-PS1-1

C₂H₄ What is the empirical formula?

• CH

• CH₂

• C₄H₂

• C₂H₄

S₂O₈ What is the empirical formula?

• S₂O₈

• SO

• SO₄

• S₈O₂

What is the empirical formula of a compound that contains 40% sulfur and 60% oxygen by mass?