Empirical and Molecular Formula

Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine.

• CrCl

• CrCl₃

• Cr₃Cl

• Cr₂Cl₆

A compound containing 92.3 percent carbon and 7.7 percent hydrogen. What is the empirical formula?

• CH

• CH₂

• C₂H

• C₂H₂

When calculating the empirical formula the mole ratio is given as follows: H₁O_3.5 What will the EF be?

• H₁O_3.5

• HO_3.5

• HO₄

• H₂O₇

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

• C₃H₆

• CH₂

• C₂H₄

• CH₃

A compound has the empirical formula CH. The molecular mass is found to be somewhere between 75 - 80 g/mol. What is the molecular formula of the compound?

• C₂H₂

• C₃H₃

• C₅H₅

• C₆H₆

A compound has the molecular formula C₁₂H₂₄O₆. What is the empirical formula of this compound?

• CHO

• C₂H₄O

• C₆H₁₂O

• CH₂O

A compound has the molar mass of 170.0 g/mol and an empirical formula of SiF₃. The compounds molecular formula is

• SiF₃

• Si₂F₆

• Si₅F₁₅

• Si₄F₁₂

Which one is empirical?

• H₂O₂

• C₂H₆O₁₂

• CaCl₂

• N₂O₈

What is the empirical formula for a compound containing the following ratio:
3Na:1P:4O

• NaPO₄

• Na₃P₄O

• Na₃PO₄

• NaPO

Tags

NGSS.MS-PS1-1

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

• NO

• N₂O₃

• N₂O₄

• N₂O₅