Select the two models that represent molecules of substances with the same chemical formula but different arrangements of atoms.

Question

H

C

O

Cl

actyl chloride, chloroacetic acid,2-chloroethanol,or chloracetaldehyde
Complete the chemical formula for the two substances.
If an atomic symbol has no subscript, leave the box next to the symbol blank.
C
H
Cl
O

Answer 1

The two models that represent molecules with the same chemical formula but different arrangements of atoms are "chloroacetic acid" and "2-chloroethanol." Both of these compounds have the same molecular formula, which is C₂H₃ClO₂.

Here’s how they can be represented:

For chloroacetic acid (C₂H₃ClO₂):

• C: 2
• H: 3
• Cl: 1
• O: 2

For 2-chloroethanol (C₂H₅ClO):

• C: 2
• H: 5
• Cl: 1
• O: 1

Both substances have the same base components of carbon, hydrogen, chlorine, and oxygen, but are arranged differently in their molecular structure.