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CBSE Class 12-science Answered

an fcc lattice has lattice parameters a=400 pm . calculate the molar volume of the lattice including all the empty space
Asked by tejuaaygole | 11 Jul, 2020, 10:40: AM
Expert Answer
Molar volume of unit cell can be calculated by-
 
V o l u m e space o f space U n i t space C e l l equals left parenthesis 400 right parenthesis to the power of 3 space end exponent space p m cubed equals 64 cross times 10 to the power of negative 24 end exponent space c m cubed
Volume space of space straight N subscript straight A space Unit space cell equals 64 cross times 10 to the power of negative 24 end exponent cross times 6.022 cross times 10 to the power of 23 space cm cubed equals 38.4 space cm cubed
Molar space volume equals fraction numerator 38.4 over denominator 4 end fraction equals 9.6 space mL
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