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Textbook 2E15B

Posted: Sun Dec 06, 2020 9:06 pm
by Connie Liang 3L
How come in the answer manual the bond angles are approximately 120 degrees and 90 degrees and not less than 120 degrees and less than 90 degrees? Isn't a see saw shape supposed to mean that the bond angles are "less than" because there's a lone pair?

Re: Textbook 2E15B

Posted: Sun Dec 06, 2020 9:10 pm
by SophiaBarden 2E
Yes but actually calculating bond angles are beyond the scope of this class so most of the time, we just state that the angles are approximations

Re: Textbook 2E15B

Posted: Sun Dec 06, 2020 9:13 pm
by Edward Tang 1k
They are pretty close to 90 and 120 so saying approximately is pretty much equivalent to saying less than

Re: Textbook 2E15B

Posted: Sun Dec 06, 2020 9:17 pm
by Connie Liang 3L
Got it. I was confused because for other questions the answer had "less than" so I was wondering why didn't this one have it too. Thanks for clarifying.