The Born-Haber cycle for KCl is evaluated with the following data :

$${\Delta _f}{H^\Theta }$$ for KCl = $$-$$436.7 kJ mol^$$-$$1 ;

$${\Delta _{sub}}{H^\Theta }$$ for K = 89.2 kJ mol^$$-$$1 ;

$${\Delta _{ionization}}{H^\Theta }$$ for K = 419.0 kJ mol^$$-$$1 ;

$${\Delta _{electron\,gain}}{H^\Theta }$$ for Cl_(g) = $$-$$348.6 kJ mol^$$-$$1 ;

$${\Delta _{bond}}{H^\Theta }$$ for Cl₂ = 243.0 kJ mol^$$-$$1

The magnitude of lattice enthalpy of KCl in kJ mol^$$-$$1 is _____________ (Nearest integer)

The total number of negative charge in the tetrapeptide, Gly-Glu-Asp-Tyr, at pH 12.5 will be ______________. (Integer answer)

An aqueous KCl solution of density 1.20 g mL^$$-$$1 has a molality of 3.30 mol kg^$$-$$1. The molarity of the solution in mol L^$$-$$1 is ____________ (Nearest integer) [Molar mass of KCl = 74.5]

The sum of solutions of the equation

$${{\cos x} \over {1 + \sin x}} = \left| {\tan 2x} \right|$$, $$x \in \left( { - {\pi \over 2},{\pi \over 2}} \right) - \left\{ {{\pi \over 4}, - {\pi \over 4}} \right\}$$ is :