The model below represents reactants chemically bonding to form a compound. What compound is formed after chemical bounding?
A. Mg3N2
B. Mg2N3
C. MgN
D. Mg6N4

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A.(nh4)(2co3)is the correct answer 

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.