The molar solubility of Zn(OH)₂ in 0.1 M NaOH solution is x $$\times$$ 10^$$-$$18 M. The value of x is _________ (Nearest integer)

(Given : The solubility product of Zn(OH)₂ is 2 $$\times$$ 10^$$-$$20)

For the reaction, 2NO₂(g) $$\rightleftharpoons$$ N₂O₄(g), when $$\Delta$$S = $$-$$176.0 JK^$$-$$1 and $$\Delta$$H = $$-$$57.8 kJ mol^$$-$$1, the magnitude of $$\Delta$$G at 298 K for the reaction is ___________ kJ mol^$$-$$1. (Nearest integer)

The sum of oxidation states of two silver ions in [Ag(NH₃)₂] [Ag(CN)₂] complex is _____________.

The number of atoms in 8g of sodium is x $$\times$$ 10²³. The value of x is ____________. (Nearest integer)

[Given : N_A = 6.02 $$\times$$ 10²³ mol^$$-$$1

Atomic mass of Na = 23.0 u]