Some Basic Concepts Of Chemistry Question 178
Question: If $ N _{A} $ is Avogadro?s number then number of valence electrons in 4.2 g of nitride ions $ ({N^{3-}}) $
Options:
A) 2.4 $ N _{A} $
B) 4.2 $ N _{A} $
C) $ 1.6,N _{A} $
D) $ 3.2,N _{A} $
Show Answer
Answer:
Correct Answer: A
Solution:
14 gm $ {N^{3-}} $ ions have $ =8N _{A} $ valence electrons 4.2gm of $ {N^{3-}} $ ions have $ =\frac{8N _{A}\times 4.2}{14}=2.4N _{A} $
