See below
a) ##”BCl”_3##
We leave it as an exercise for the student to do this one.
b) ##”PCl”_5##
Another exercise, but here’s a link to the to help you.
c) ##”NCl”_3##
(i) Lewis structure
https://cluster13-files.instructure.com/courses/986898/files/31116480/course%20files/003%20Chapter%209%20Chemical%20Bonding%20I%3A%20%20Lewis%20Theory/Electron%20Dot%20Structures/07048%20bbluejpg
(from usflearn.instructure.com)
This is an ##”AX”_3″E”## molecule.
(ii) Shape — Trigonal pyramid
http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401098305/ql7oh2p4szvm3yphhcp5png
(from www.answers.com)
(iii) Bond angles — slightly less than 109.5°
(iv) Polarity — polar
(d) ##”SO”_3##
(i) Lewis structure
(from gallery4share.com)
This is an ##”AX”_3## system.
(ii) Shape — Trigonal planar
http://glencoe.mcgraw-hill.com/sites/dl/free/007874637x/514757/trigonal_planarjpg
(from www.suggestkeyword.com)
(iii) Bond angles — 120°
(iv) Polarity — nonpolar
All bond dipoles cancel, therefore
e) ##”XeF”_4##
(i) Lewis structure
http://images.tutorvista.com/cms/images/101/lewis-dot-structure-of-xef4png
(from chemistry.tutorvista.com)
This is an ##”AX”_4″E”_2## structure.
(ii) Shape — square planar
(iii) Bond angles — 90°
(iv) Polarity — nonpolar
f) ##”HBF”_2##
(i) Lewis structure
(from www.uwplatt.edu)
This is an ##”AX”_3## structure.
(ii) Shape — Trigonal planar
(iii) Bond angles — Approximately 120°.
(iv) Polarity — polar
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