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The answer to your question is: Element B

Explanation:

Ionization energy is the amount of energy needed to remove one electron from the outermost shell of an atom.

Ionization energy increases from bottom to top and from left to right. That means that smaller atoms have a greater ionization energy.

Element B, is the one with the lowest ionization energy because it is in the left part of the periodic table.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :