The chemical formula of acetylene is #C_2H_2#. What type of bond holds the two carbon atoms together?

Answer 1

A #C-=C# triple bond.

Each carbon contributes 4 electrons; each hydrogen contributes 2 electrons. A Lewis representation must therefore distribute 10 electrons: #2xxC-H# bonds, 4 electrons, and #1# #C-=C# triple bond, 6 electrons.

A valence bond formalism would gives rise to 2 #sp# hybrid orbitals on each #C# atom; one such hybrid interacts with #H# to form a #C-H# bond, and the remaining orbital forms a #C-C# bond. The remaining 4 electrons remain unhybridized and forms #pi# bonds above and below the plane of the #C-C# vector.

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Answer 2

Kai Bowman

three-bond.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.