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Gold crystallises in an fcc cell with edge 408 pm and molar mass 197 g/mol. Its density is closest to what?
A9.6 g/cm3
B12.4 g/cm3
C19.3 g/cm3
D38.5 g/cm3
Answer & Solution
Correct answer: C. 19.3 g/cm3
Density = 4 x 197 / ((4.08e-8)^3 x 6.022e23) which is about 19.27 g/cm3.
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