During the qualitative analysis of salt with cation y2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are :
Atoms of element X form hcp lattice and those of element Y occupy $${2 \over 3}$$ of its tetrahedral voids. The percentage of element X in the lattice is ____________. (Nearest integer)
2O3(g) $$\rightleftharpoons$$ 3O2(g)
At 300 K, ozone is fifty percent dissociated. The standard free energy change at this temperature and 1 atm pressure is ($$-$$) ____________ J mol$$-$$1. (Nearest integer)
[Given : ln 1.35 = 0.3 and R = 8.3 J K$$-$$1 mol$$-$$1]
The osmotic pressure of blood is 7.47 bar at 300 K. To inject glucose to a patient intravenously, it has to be isotonic with blood. The concentration of glucose solution in gL$$-$$1 is _____________.
(Molar mass of glucose = 180 g mol$$-$$1, R = 0.083 L bar K$$-$$1 mol$$-$$1) (Nearest integer)