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For ethane, what is the correct framework of the Lewis structure?

Answer 1

A #C-C# backbone; of course, #C# has always has the ability to CATENATE, and form chains of various length.

So here the chain length is only 2 carbons long. We visualize a #C-C# bond (note that carbon has 4 valence electrons, and here we have used one on EACH carbon to form the first bond); now each carbon has 3 valence electrons; there are 3 hydrogens (with 1 electron each) to bind to each carbon to give #H_3C-CH_3#, our representation of ethane.

The points to remember? That carbon has 4 valence electrons. Of course for #C#, #Z=6#, i.e. 6 positively charged nuclear particles. There are 2 inner core electrons associated with the carbon atom to give a neutral species, but these are inner core and not involved in bonding. Carbon here is correctly identified as a neutral particle.

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Answer 2

Brooklyn Barber

The correct framework of the Lewis structure for ethane (C2H6) is:

H H \ / C=C /
H H

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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.