Empirical Formula

What is the empirical formula of a substance with the molecular formula NaCl?

• Na₂Cl

• NaCl₂

• NaCl

• Na₂Cl₂

What is the empirical formula of a substance with the molecular formula C₂H₄?

• C₂H₂

• C₂H₂

• C₁H₁

• CH₂

Determine the empirical formula for a compound that is 23.3% Co, 25.3% Mo and 51.4% Cl by mass. What is the empirical formula?

• Co Mo Cl₄

• Co₃Mo₂Cl₁₁

• Co₂MoCl₃

• Co₂MoCl₉

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

• KCO

• K₂CO

• KCO₃

• K₂CO₃

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

Tags

NGSS.HS-PS1-1

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

• UOF

• UO₂F₂

• U₂OF

• U₂O₂F

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

Determine the empirical formula for a compound that is 63.53 % Fe and 36.47 % S by mass.

• Fe₂S₃

• FeS

• FeS₂

• Fe₃S₂