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the claim

The general chemical formula for alkynes is CnH2n - 2.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
6 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

AS REPORTEDno primary record reached; this is what the reporting says

Is it true that the general chemical formula for alkynes is CnH2n - 2?

Yes. Multiple authoritative chemistry sources confirm that the general chemical formula for acyclic alkynes with one triple bond is CnH2n-2.

Verdict: SUPPORTED · 6 sources for, 0 against · Last checked

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Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 6
Wikipedia: Alkyne
Reference article covering this claim directly
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Wikipedia: Alkyne. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Alkyne

2 recorded entries grouped as this source

Additional records of the same source are shown below. They are not counted as additional sources.

Wikipedia: Wikipedia: Alkyne
Confirms that acyclic alkynes form a homologous series with the general formula CnH2n-2.
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Wikipedia: Wikipedia: Alkyne. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Alkyne

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More for · 5
LibreTexts: LibreTexts: 12.05: Alkenes and Alkynes
Explicitly states that alkynes have a general formula of CnH2n-2.
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LibreTexts: LibreTexts: 12.05%3A Alkenes and Alkynes. (n.d.). LibreTexts. https://chem.libretexts.org/Courses/Anoka-Ramsey_Community_College/Introduction_to_Chemistry/12%3A_Organic_Chemistry/12.05%3A_Alkenes_and_Alkynes

Wikibooks: Wikibooks: AP Chemistry/Printable version
Lists alkynes as having the general formula of CnH2n-2.
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Wikibooks: Wikibooks: AP Chemistry/Printable version. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/AP_Chemistry/Printable_version

Simple English Wikipedia: Simple English Wikipedia: Hydrocarbon
States that CnH2n-2 is the general formula for alkynes.
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Simple English Wikipedia: Simple English Wikipedia: Hydrocarbon. (n.d.). Simple English Wikipedia. https://simple.wikipedia.org/wiki/Hydrocarbon

Wikiversity: Wikiversity: Organic chemistry/Naming
Gives the general alkyne formula as CnH2n-2.
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Wikiversity: Wikiversity: Organic chemistry/Naming. (n.d.). Wikiversity. https://en.wikiversity.org/wiki/Organic_chemistry/Naming

LibreTexts: LibreTexts: 13: Unsaturated and Aromatic Hydrocarbons
Notes that alkynes have the formula CnH2n-2.
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LibreTexts: LibreTexts: 13%3A Unsaturated and Aromatic Hydrocarbons. (n.d.). LibreTexts. https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/The_Basics_of_General_Organic_and_Biological_Chemistry_(Ball_et_al.)/13%3A_Unsaturated_and_Aromatic_Hydrocarbons

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