Empirical and Molecular Formulas

Which of the following is an empirical formula?

• C₂H₄

• NH₃

• C₄H₈

• C₅H₅

Which of the following is a molecular formula only?

• C₃H₉

• NaCl

• Mg(OH)₂

• H₂O

Tags

NGSS.MS-PS1-1

What is the empirical formula of P₄H₁₀?

• P₄H₁₀
• P₄H₅
• P₂H₁₀
• P₂H₅

Tags

NGSS.HS-PS1-1

What is the empirical formula for C₁₂H₂₄?

• C₆H₁₂
• C₂H₄
• CH₂
• C₁₂H₂₄

Which of the following could be the molecular formula for CH₂O?

• C₁₂H₂₄O₁₂
• C₂H₄O
• C₆H₁₂O₁₂
• CH₂O

Tags

NGSS.MS-PS1-1

All of the following are empirical formulas except

• H₂O
• N₂O₅
• C₁₀H₂₃
• P₄H₁₀

All of the following formulas are molecular formulas except

• C₁₂H₂₄O₁₂
• H₂O₂
• N₂O₂
• C₁₂H₂₄OH

Tags

NGSS.MS-PS1-1

What is the definition of an empirical formula?

• consists of the symbols for the elements combined in a compound, with subscripts showing the lowest whole-number ratio of the different atoms in the compound.
  
• indicates the types and numbers of atoms in a single molecule of a molecular (covalent) compound.
• can be a whole-number multiple of an empirical formula.
• a formula that is divisible by 5