(Polar molecules, Non-polar molecules, etc.)
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I had a question regarding a question about HNO3, When I drew the lewis structure I got that it is a trigonal planar structure, and the N is sp2 hybridized. Because all the atoms attached to the N are the same (they are all O), and the structure is trigonal planar, I thought that that the molecule overall would not be polar. Could someone please explain why the molecule is polar?
The molecule is polar just because of the hydrogen bonded to one of the Oxygens. This makes the entire molecule not symmetrical, making it polar, even though the shape of the central nitrogen is trigonal planar.