Which expression gives the density of a cubic crystal with n particles per cell, molar mass M and edge a?
AnM / (a^3 NA)
BM a^3 / (n NA)
Cn NA / (M a^3)
DM NA / (n a^3)
Answer & Solution
Correct answer: A. nM / (a^3 NA)
Mass of the cell is nM/NA and its volume is a^3, so density is nM/(a^3 NA).
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