Find the valence shell electronic configuration of element belonging to group 8a and period 4

2.8.8.

Explanation:

The element belonging to Group 8a and period 4 is Krypton, which has 18 electrons. The valence shell electronic configuration for the first 20 elements is 2.8.8.2 so Krypton's valence shell electronic configuration would be 2.8.8. only.

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 :