Use the law of conservation of mass to explain why the equation in the equation 2H2 + O2 = 2H2O is balanced

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.

The answer is d- principle of faunal succession.