I cant see the question im sorru
I think the correct answers from the choices listed above are the first, third and the last option. Ionic compounds are compounds that dissociates into ions when in aqueous solution. From the list, NH4Cl, KF and MgO are the ionic compounds. Hope this answers the question.
To communicate the results in an organized report
Answer:
Here's what I find.
Explanation:



The sign of ΔH changes when you reverse the reaction.