Empirical & Molecular Formula

Do the diagrams have the same molecular formula?

• Yes

• No

Do the diagrams have the same empirical formula?

• Yes

• No

If black ball represents carbon (C) atom and white balls represent hydrogen (H) atoms. What is the molecular formula of the diagram shown?

• CH

• CH₄

• C₄H

• C₄H₄

If black ball represents carbon (C) atom and white balls represent hydrogen (H) atoms. What is the molecular formula of the diagram shown?

• CH

• CH₄

• C₂H₄

• C₄H₄

Do the diagrams have the same molecular formula?

• Yes

• No

Do the diagrams have the same empirical formula?

• Yes

• No

The molecular and empirical formula of a compound are __________ the same.

• always

• sometimes

• never

• one and

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. What is the empirical formula of this compound?

• C₃H₃Cl

• CH₆Cl₃

• CH₃Cl₃ 

• CHCl₃

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. What is its molar mass in g/mol?

• 124.42

• 121.39

• 119.37 

• 74.51

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. If a compound which shares the same empirical formula as chloroform is known to have a molar mass of 223.53g/mol, what is the compound’s mole ratio with chloroform?

• 2

• 3

• 4

• 5