What is the general formula for alkenes?

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Multiple Choice

What is the general formula for alkenes?

Explanation:
Alkenes are hydrocarbons that contain a carbon–carbon double bond, so they are less saturated with hydrogen than alkanes. For straight-chain (acyclic) alkenes, each carbon follows four bonds but the double bond uses two of those bonds between carbons, reducing the hydrogen count by two for every carbon pair involved. This leads to the general formula CnH2n for acyclic alkenes, where n is the number of carbon atoms. For example, ethene is C2H4, propene is C3H6, and butene is C4H8. If a molecule forms a ring, the hydrogen count changes further, giving a cyclic alkene formula of CnH2n−2, but the typical general formula taught for straight-chain alkenes is CnH2n.

Alkenes are hydrocarbons that contain a carbon–carbon double bond, so they are less saturated with hydrogen than alkanes. For straight-chain (acyclic) alkenes, each carbon follows four bonds but the double bond uses two of those bonds between carbons, reducing the hydrogen count by two for every carbon pair involved. This leads to the general formula CnH2n for acyclic alkenes, where n is the number of carbon atoms. For example, ethene is C2H4, propene is C3H6, and butene is C4H8. If a molecule forms a ring, the hydrogen count changes further, giving a cyclic alkene formula of CnH2n−2, but the typical general formula taught for straight-chain alkenes is CnH2n.

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