A solution containing 2.5 $$\times$$ 10^$$-$$3 kg of a solute dissolved in 75 $$\times$$ 10^$$-$$3 kg of water boils at 373.535 K. The molar mass of the solute is ____________ g mol^$$-$$1. [nearest integer] (Given : K_b(H₂O) = 0.52 K kg mol^$$-$$1 and boiling point of water = 373.15 K)

pH value of 0.001 M NaOH solution is ____________.

For the reaction taking place in the cell :

Pt (s)| H₂ (g)|H⁺(aq) || Ag⁺(aq) |Ag (s)

E$$_{cell}^o$$ = + 0.5332 V.

The value of $$\Delta$$_fG$$^\circ$$ is ______________ kJ mol^$$-$$1. (in nearest integer)

It has been found that for a chemical reaction with rise in temperature by 9 K the rate constant gets doubled. Assuming a reaction to be occurring at 300 K, the value of activation energy is found to be ____________ kJ mol^$$-$$1. [nearest integer]

(Given ln10 = 2.3, R = 8.3 J K^$$-$$1 mol^$$-$$1, log 2 = 0.30)