consider the reaction 2A + 3B ---> 3C +2D. the standard enthalpy of formation for A, B,C and D are -79.8, 49.2, -145.8, and -87.4, in kJ/mol. What is the standard enthalpy change for the reaction in kJ / mol?

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?

Which factor is likely to impact the possible number of compounds? presence of unlimited number of elements in the periodic table the inability of atoms to align perfectly with other atoms the ability of all elements to react with every other element all elements being equally reactive