Percent Composition, Empirical and Molecular Formula

What is the empirical formula for the following:
Pb₅Cr₅O₂₀

• Pb₂Cr₂O₁₀

• PbCr₂O₇

• Pb₉Cr₄O₂

• PbCrO₄

Tags

NGSS.HS-PS1-7

What is the empirical formula if you have 88.80% copper and 11.20% oxygen?

• Cu₃O₈

• CuO₄

• Cu₂O

• Cu₄O₁₀

Tags

NGSS.HS-PS1-7

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

• CO₂Li₃

• Li₂CO₃

• Li₃CO₂

• LiCO₅

What is the empirical formula for N₂S₃?

• NS

• N₃S₂

• N₂S₃

• N₁S_1.5

What is the empirical formula for C₄H₆?

• CH

• CH₃

• C₂H₃

• C₄H₆

Tags

NGSS.MS-PS1-1

a chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio

• conversion factor

• molecular formula

• empirical formula

• representative particle

a chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of a compound

• conversion factor

• Avogadro's number

• empirical formula

• molecular formula

the percent by mass of each element in a compound

• molar mass

• Avogadro's number

• representative particle

• percent composition

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. What is the empirical formula of this compound?

• C₃H₃Cl

• CH₆Cl₃

• CH₃Cl₃ 

• CHCl₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Do the diagrams have the same empirical formula?

• Yes

• No

Tags

NGSS.HS-PS1-7