In which of the following pairs of substances would both species in the pair be written in molecular form in a net ionic equation?

Question

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In a net ionic equation, strong electrolytes are written as ions, while weak electrolytes and nonelectrolytes are written in molecular form. HF (hydrofluoric acid) is a weak acid and thus would be written in molecular form. COS (carbon oxysulfide) does not dissociate into ions in solution, so it would also be written in molecular form.

In Which of the Following Pairs of Substances Would Both