Some Basic Concepts Of Chemistry Question 28
Question: A sample of $ AlF _3 $ contains $ 3.0\times 10^{24}{F^{-}} $ ions. The number of formula unit of this sample are-
Options:
A) $ 9\times 10^{24} $
B) $ 3\times 10^{24} $
C) $ 0.75\times 10^{24} $
D) $ 1.0\times 10^{24} $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] An, $ AlF _3 $ the number of F is 3 for one $ AlF _3 $ molecule $ 3{F^{-}}\equiv 1 $ formula unit of $ AlF _3 $ $ 3.0\times 10^{24}{F^{-}}\equiv \frac{1}{3}\times 3.0\times 10^{24}AlF _3 $ units
