The possible resonance structures for the cyanate ion, OCN , are: N=c=ö :NEC-O: :N-CEO: Structure A Structure B Structure C Which structure is the most stable? [ Select] What are the formal charges on the oxygen (O), carbon (C), and nitrogen (N) atoms, respectively, in the resonance structure that contributes most to the stability of the cyanate ion, OCN? O: [ Select ] C [ Select ] [ Select ] > > >

number 2 asks A B or C

3. Lewis structures of two chemical species are shown below. For each, give (i) the formal charge on each atom and (ii) the overall charge on each species. Structure a Structure b :F :O-CFo H- Atom 1 Atom 2 Atom 3 Atom 4 Atom 5 Хе Oa Ob Fa Fb H Cl Oa Ob Ос రీరేజిి

Consider the following structures of the sulfate ion: 2- :Ö: :0: I Which statement below is false? 0 II :0= These are resonance structures. :0: S 1 0 III 2. The formal charge on sulfur is different in all the three structures. Structure III contributes most to the true structure of the sulfate ion than structures I and II. Structure I contributes most to the true structure of the sulfate ion than structures II and III.

Which one is the best Lewis structure? Why? E%3D the first one since the formal charge on the N is -1 O the second one since the formal charge of -1 is on the O :0: : Z

The formal charge on carbon in CO 3 2- is :0: 지 :0: :0: +2 +4 -4 +1 0 where the Lewis structure of the ion is: