Empirical Formulas Practice

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

• Molecular Formula

• Chemical Formula

• Empirical Formula 

• Distance Formula

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

• Mg₄N₃

• MgN₂

• Mg₃N₂ 

• MgN

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

•  NaPO2

• Na2PO3

• Na3PO4

• NaPO4

What is the empirical formula for N₂S₃?

• NS

• N₃S₂

• N₂S₃

• N₁S_1.5

How many Carbons "C" are in C₁₈H₃₄O₃

• 18

• 34

• 3

• 37

Tags

NGSS.MS-PS1-1

Which pair has the same empirical formula?

• NaCrO₄ and Na₂Cr₂O₇

• C₂H₄O₂ and C₆H₁₂O₆

• C₃H₆O₃ and C₂H₆O₂

• CH₄ and C₂H₆

Tags

NGSS.HS-PS1-7

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 percent by mass of oxygen in MgO?

• 20%

• 40%

• 50%

• 60%

Which one is an empirical formula?

• H₂O₂

• C₂H₆O₁₂

• CaCl₂

• N₂O₈

Tags

NGSS.MS-PS1-1

Which of these is NOT an empirical formula?

• CH2

• C2H5

• C6H4

• C3H7

• C5H17