HINT: Write a balanced chemical equation that illustrates the standard enthalpy of formation of N2O5. The standard molar internal energy of formation of N2O5(g) is 17.433 kJ/mol at 298 K. What is the standard molar enthalpy of formation of N2O5(g) at the same temperature

Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))

Answer it is also known as the completion state is untrue of the activation complex;

Tell me the answer choices and i would be able to answer. : )

Caso4(s) < > ca+2 + so4^-2 ksp = [ca+2][so4^-2] = 2.4 x 10^-5 = [0.20][so4^-2] [so4^-2] =1.2 x 10^-4 ag2so4(s) ,> 2ag+ + so4^-2 ksp = [ag+]^2[so4^-2] = 1.5 x 10^-5 = (0.30)^2[so4^-2] [so4^-2] = 1.5 x 10^-5/0.09 = 1.7 x 10^-4 caso4 would precipitate first since it requires less so4^- to form a saturated solution.  i believe this is right, i hope it !