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![[Post New]](/templates/default/images/icon_minipost_new.gif) 3 Apr 2008 18:55:43 IST
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d density of CaF2 is 3.18g/cc at 20 C calculate dimensin of unit cube of substance containing 4 Ca+2 & 8 F- ions
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its time fr u to achive d goal wake up donot hesitate to do hard work |
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3 Apr 2008 20:38:12 IST
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1 mole CaF2 weighs 40+19+19=78 grams
so 1 molecule weighs
78/6*1023 grams
now in 1 unit cell, 4 molecules
so weight of 1 unit=312/6*1023
Volume=mass/density
=312/31.2*6*1023
=1.667*10-23 cc
assuming it as a cube,
p3=V
so p=V1/3=2.55*10-8cm
=2,55 Angstrom
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