Empirical and Molecular Formula

A formula with the lowest whole # ratio of elements in a compound is called

• Molecular Formula
• Chemical Formula
• Empirical Formula 
• Distance Formula

What is the empirical formula for N₂S₃?

• NS

• N₃S₂

• N₂S₃

• N₁S_1.5

What is the empirical formula for C₄H₆?

• CH

• CH₃

• C₂H₃

• C₄H₆

Which pair has the same empirical formula?

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

You are given 40.05g S and 59.95g O. Find the empirical formula for these elements.

• SO

• SO2

• SO3

• SO4

Given the following: 42.07g Na, 18.89g P, and 39.04g O, determine the empirical formula.

• NaPO2

• Na2PO3

• Na3PO4

• NaPO4

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

• Mg₄N₃

• MgN₂

• Mg₃N₂

• MgN

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

• CH₂O

• C₂H₄O₂

• C₄H₈O₄

• C₆H₁₂O₆

Which of the following compounds are both an empirical AND molecular formula (check all that apply)

• C₆H₁₂O₆

• C₁₂H₂₂O₁₁

• H₂O₂

• S₂O₄

• H₂O

Abigail, Aria, and Isla are working on a chemistry project. They have found an unknown compound with an Empirical Formula of CF₂. They also determined that the Molecular formula mass of the compound is 192 g/mol. Can you help them figure out the Molecular Formula of the compound?

• C₄F₈

• C₈F₄

• C₃F₆

• C₂F₄

Tags

NGSS.HS-PS1-7