August 2018 NY Regents Chemistry Exam
44 What is the chemical name for the compound CH3CH2CH2CH3?
(1) butane
(2) butene
(3) decane
(4) decene
Solutions: Table Q on the Reference Table shows hydrocarbons. This hydrocarbon has all single bonds and therefore, must be an alkane. Alkane names end in "ane", eliminating choices 2 and 4. Next, we can count the number of carbons in the compound, which is 4. Table P shows the prefixes for the carbon chains. The prefix for a chain of 4 carbons in "but". Butane must be the name for the compound presented.
Answer: 1
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