How can you tell if a molecule is polar or nonpolar

  • #1
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1
Hello,

for octane (C8H18), how can you tell whether or not it is polar or non-polar without drawing a lewis structure diagram? also, if you absolutely need to draw one, what is the easiest way to go about drawing a more advanced molecule like octane? I can draw simple molecules and find their shapes, i.e. planar triangles, etc, but I get lost when faced with bigger ones.

thank you
 

Answers and Replies

  • #2
Borek
Mentor
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Alkanes are non-polar almost by definition.
 

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