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What does the name 2–butene tell you about this hydrocarbon's molecular structure?


A.There are two carbon atoms and all single carbon bonds.

BThere are two carbon atoms and a double carbon bond.

CThere are three carbon atoms and a double carbon bond that starts on the second carbon atom.

DThere are four carbon atoms and a double carbon bond that starts on the second carbon atom.

Verified Answer :

Edufirst

Option D. There are four carbon atoms and a double bond that starts on the second carbon atom.

Methane: one carbon
Ethene: two carbons
Propene: three carbons
Butene: four carbons.
Pentene: five carbons

The suffix - ene is used for double bonds.

The number 2- indicates the place of the carbon on which the double bond is located.

PurifiedWater12

Gradpoint answer:  a four-carbon hydrocarbon with a double bond between the second and third carbon atoms

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