Any three examples of 2n² rules.
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Explanation:

This rule of arrangement of electrons according to the shell is known 2n2 rule where n means number of shell. For example: There is one proton in the nucleus of hydrogen atom, which moves in K shell path. It has no neutron. Helium atom contains 2 protons and 2 neutrons.

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 :

level 4 to level 2 : ))