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Label each carbon atom with its optimum C-C-C bond angle. Note: If one or more bond angles are incorrectly placed, a single red X will appear on the top left.
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120 degrees
180 degrees
90 degrees
109.5 degrees
♦ Relevant knowledge
Carbon is able to form four fundamental kinds of bonds which are single, double triple as well as the unusual allenic bond. Allenes are composed of two double bonds in the same carbon. The bonds are 180 degrees apart while the pi and double bonds have an orthogonal shape.
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1 Answer