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3 sigma bonds and 2 pi bonds. C2H2 (ethyne or acetylene) HCCH, has 2 sigma bonds between the carbon atoms and the terminal hydrogen atoms, these are single bonds. Between the carbon atoms there is one sigma bond and two pi bonds, making this a triple bond.

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โˆ™ 11y ago
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โˆ™ 11y ago

It has seven sigma bonds, 6 C-H bonds and one C-C single bond.

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Q: How many sigma and pi bonds are in C2H2 in which the two carbons are in the center and each carbon has one hydrogen bonded to it?
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