Mole ConceptEasy
Question
If NA is Avogadro′s number then number of valence electrons in 4.2 g of nitride ions (N3-)
Options
A.2.4 NA
B.4.2 NA
C.1.6 NA
D.3.2 NA
Solution
no. of moles= 4.2/420 =0.1
no. of valence electron in 1 atom = 24
so ans is 0.1*24*NA
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