For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?2Na(s)+Cl2(g)→2NaCl(s)H2 (g)+12O2(g)→H2O(g)Na(s)+12Cl2(g)→Na Cl(s)H2O2(g)→12O2(g)+H2O(g)2H2(g)+O 2(g)→2H2O(g)Na(s)+12Cl2(l)→NaCl(s)

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but