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45.
http://imgur.com/abHpF.jpg
67.
http://imgur.com/zOBwt.jpg
91.
http://imgur.com/1ODGS.jpg
101.
http://imgur.com/lmfbT.jpg
117.
http://imgur.com/wnNGo.jpg
解答：
45. 313 pm
67. NaCl: 4Na+, 4Cl-; CsCl: 1Cs+, 1Cl-; ZnS: 4Zn2+, 4S2-; TiO2: 2Ti4+, 4O2-
91. 77度C
101. A: solid; B: liquid; C: vapor; D: solid + vapor;
E:solid + liquid + vapor (triple point); F: liquid + vapor;
G: liquid +vapor (critical point); H:vapor
the first dashed line (at the lower temperature) is the normal freezing point,
and the second dashed line (at the higher temperature) is the normal boiling
point.
The solid phase is denser.
117. A: CH4; B: SiH4; C: NH3
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