Regents Chemistry Exam August 2022
48. The compounds CH3CH2CH2OH and CH3OCH2CH3 have different
(1) numbers of carbon atoms per mole
(2) numbers of hydrogen atoms per mole
(3) functional groups (4) molecular masses
Explanation: Let's take a look at the two molecules. If we count the number of carbons, hydrogens and oxygens, we can see that they both have the same number of each eliminating answer choices 1,2,and 4. CH3CH2CH2OH has an alcohol function group (OH) which can be found in the Table R on the Reference Table. CH3OCH2CH3 has an ether functional group (-O-).
Answer: 3
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