Let's solve the isomer question step by step. ### Step 1: Analyze the Structures The two structures in the image are: - **Propanol (C₃H₇OH)**: The OH group is on the end carbon. - **Dimethyl ether (CH₃OCH₃)**: The O is between two methyl groups. Both have the same number of carbons, hydrogens, and oxygens. --- ### Step 2: Fill in the Blanks #### Sentence 1 > The two molecules above, which have __________ chemical formula but different functional groups, are considered __________. - **Answer:** *identical* (no, they are not identical), *similar* (no), *different* (no), *isomers* (yes), etc. **Correct fill-ins:** "The two molecules above, which have **identical** chemical formula but different functional groups, are considered **isomers**." --- #### Sentence 2 > The molecular formula for both molecules is __________, although one is a(n) __________ while the other is an __________ (double bonded O). - **Answer choices:** C₃H₈O, C₂H₆O, alcohol, ether, carbonyl, etc. **Correct fill-ins:** "The molecular formula for both molecules is **C₃H₈O**, although one is an **alcohol** while the other is an **ether** (double bonded O)." --- #### Sentence 3 > Because of their minor differences in the arrangement of atoms, we would expect these two molecules to have __________ chemical properties and to __________ in chemical reactions. - **Answer choices:** similar, different, be unreactive, react differently, etc. **Correct fill-ins:** "Because of their minor differences in the arrangement of atoms, we would expect these two molecules to have **different** chemical properties and to **react differently** in chemical reactions." --- ## Final Complete Answer --- **The two molecules above, which have _identical_ chemical formula but different functional groups, are considered _isomers_.** **The molecular formula for both molecules is _C₃H₈O_, although one is an _alcohol_ while the other is an _ether_ (double bonded O).** **Because of their minor differences in the arrangement of atoms, we would expect these two molecules to have _different_ chemical properties and to _react differently_ in chemical reactions.** --- Let me know if you need further explanation!