chemistry

Explain each of the following observations in terms of the electronic strucutre and/ or bonding of the compunds involved.
(a)At ordinary conditions, HF( normal boiling point=20C) is a liquid, whereas HCl(normal boiling point=-114C) is a gas. (b)Molecules of AsF3 are polar, whereas molecules of AsF5 are nonpolar.
(c)The N-O bonds in the NO2- ion are equal in length,whereas they are unequal in HNO2.
(d)For sulfur, the fluorides SF2,SF4, and SF6 are known to exist, whereas for oxygen only OF2 is known to exist.

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asked by anonymous
  1. What are you thinking on these? I don't want to do your homework for you. But I can help point you in the right direction if you can be specific about what you don't understand.

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    posted by DrBob222
  2. i figured out a,b,and d. but i still don't understand c. can u please explain it too me.

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    posted by anonymous
  3. It is difficult to draw Lewis dot structure on these boards. Do you know how ro draw them. If you do, draw the one for HNO2 as well as the one for NO2^-. YOu will see that the HNO2 has a single bond from N to O and another from O to H whereas the other O is double bonded to N. So HNO2 has a single bond to one O and a double bond to the other. For the nitrite ion, you will see a double bond to one O and a single bond to the other; however, you may choose to draw the double bond to EITHER O and the single bond to EITHER O. These are resonanting structures and the N to O bond distance is a hybrid (an average) of the two structures and that makes them the same distance. Here is a site for Lewis structure of nitrite ion and another for the Lewis structure of HNO2. Remember that a line is the same as two dots. Also, to help you count the electrons, there are 18 for nitrite and 18 for HNO2.

    http://en.wikipedia.org/wiki/Nitrite

    http://en.wikipedia.org/wiki/Nitrous_acid

    Let me know if you have any questions.

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    posted by DrBob222
  4. I need help with a

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    posted by Carter
  5. lewis structure

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    posted by maria
  6. what the name of compound whicg are the boiling point are 114

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    posted by Anonymous
  7. do you have ms larriba?

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    posted by Anonymous
  8. HAHAHA I HAVE LARRIBA. that's funny, i'm glad i'm not the only one looking up the homework answers.

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    posted by Anonymous

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