Total number of molecules which have cation-a | vedclass

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Question

(B) To determine which substances exist as cation-anion pairs in the solid state:$1$. $I_{2(s)}$: It is a molecular solid held by van der Waals forces

Vedclass · Accepted Answer

$2$

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(B) To determine which substances exist as cation-anion pairs in the solid state:$1$. $I_{2(s)}$: It is a molecular solid held by van der Waals forces. It does not contain ions.$2$. Dry ice $(CO_{2(s)})$: It is a molecular solid held by van der Waals forces. It does not contain ions.$3$. $PCl_{5(s)}$: In the solid state,it exists as $[PCl_4]^+ [PCl_6]^-$,which is an ionic lattice.$4$. $N_2O_{5(s)}$: In the solid state,it exists as $[NO_2]^+ [NO_3]^-$,which is an ionic lattice.$5$. $PBr_{5(g)}$: In the gaseous state,it exists as discrete $PBr_5$ molecules. It does not contain ions.Thus,the molecules that have cation-anion pairs are $PCl_{5(s)}$ and $N_2O_{5(s)}$.The total number is $2$.

Total number of molecules which have cation-anion pair out of $I_{2(s)}$,dry ice $(CO_{2(s)})$,$PCl_{5(s)}$,$N_2O_{5(s)}$,$PBr_{5(g)}$ is

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