Molecular Formulas

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

• C₃H₆
• CH₂
• C₂H₄
• CH₃

What is the molecular formula if the empirical formula is C₂H₅ and the molecular molar mass is 58.14 g/mol?

• C₂H₅
• C₄H₁₀
• C₁H_2.5
• C₄H₈

What is the empirical formula for the following molecular formula: C₆H₁₄

• C₆H₁₄
• C₃H₇
• CH₂
• CH₃

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

• CH₂O
• C₂H₄O₂
• C₄H₈O₄
• C₆H₁₂O₆

What is the empirical formula for the following molecular formula: C₅H₁₂

• C₅H₁₂
• CH₃
• CH₂
• C_2.5H₆

Which pair has the same empirical formula?

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

Tags

NGSS.HS-PS1-7

A 4.50g sample of which of the following would have the greatest mass of oxygen? 

• Na₂O (molar mass = 62g/mol)
• Li₂O (molar mass = 30g/mol)
• MgO (molar mass = 40g/mol) 
• SrO (108g/mol) 

Tags

NGSS.HS-PS1-7

A compound is determined to contain 14g of nitrogen and 32g of oxygen. The empirical formula of the compound is: 

• NO
• NO₂
• N₂O
• NO₃

How many moles of carbon are in 88g of propane, C₃H₈. 

• 2.0
• 16.0
• 6.0
• 96.0

Write 57% as a decimal.

• 0.57
• 05.7
• 570
• 57.0