A sample of AlF3 contains 3*10^24 F- ions. The number of formula units of this sample is :(Options in description)
A) 2*10^24
B) 1*10^24
C) 5*10^23
D) 9*10^24
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Here, AlF3 is an ionic compound in which one formula unit of this has three fluoride ions attached to it.
So, in 3 x 1024 number of fluoride ions, number of formula units of AlF3 is equal to
= (3 x 1024) / 3 = 1 x 1024 Formula Units
So, option (B) is correct
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