Empirical Formulas Practice

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

• C₃H₆

• CH₂

• C₂H₄

• CH₃

Tags

NGSS.MS-PS1-1

Glucose has the formula C₆H₁₂O₆. Maltose has the chemical formula C₁₂H₂₂O₁₁. Do the have the same empirical formula?

• Yes

• No

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 empirical formula if you have 36.84% nitrogen and 63.16% oxygen?

• NO

• N₂O₄

• N₂O₃

• N₂O₅

3.245 g of a compound containing titanium and chlorine is separated into elements. If 0.819 g of the sample is titanium, what is the empirical formula of the compound? HINT: find the mass of chlorine first.

• TiCl₄

• TiCl

• TiCl₃

• TiCl₂

Tags

NGSS.HS-PS1-7

A compound is 56.58% K, 8.69% C, and 34.73% O by mass. What is its empirical formula.

• KCO

• K₂CO

• KCO₃

• K₂CO₃

Tags

NGSS.HS-PS1-7

A compound is 52.14%C, 13.13%H, and 34.73% O by mass. What is its empirical formula?

• CH₃OH

• CH₃CH₂OH

• CH₃CH₂CH₂OH

• CHO

A compound is 27.7% Mg, 23.6% P, 48.7% O by mass. What is its empirical formula?

• MgPO₄

• Mg₃PO₄

• Mg₃(PO₄)₂

• Mg₂(PO₄)₃

A compound is 77.27% U, 10.4% O, and 12.3% F. What is its empirical formula?

• UOF

• UO₂F₂

• U₂OF

• U₂O₂F

Tags

NGSS.HS-PS1-1

A compound is 16.3% C, 32.1% Cl and 51.6% F by mass. What is the empirical formula?

• C₃Cl₂F₆

• C_1.5Cl F₃

• C₂Cl₃F₆

• C₃Cl₆F₂

Tags

NGSS.HS-PS1-1