NH₄⁺(aq)+NO₃⁻(aq) → NH₄NO₃(s) How much energy is released when 3 moles of NH₄+ react?

1) -25.69 kJ
2) -51.38 kJ
3) -77.07 kJ
4) -102.76 kJ

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?