which two representations are most consistent with the model of an atom that uses probability to locate electrons?

How do we find the answer?

The formula is (nh4)2co3

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

D. h2o + h2o > h3o + oh- confirmed.