2 point 5. Silver and nitric acid react according to the following balanced
equation: 3 Ag(s) + 4 HNO3(aq) --> 3 AgNO3(aq) + 2 H2O(l) + NO(g), how
many moles of silver are needed to react with 40 moles of nitric acid
[HNO3]? *

i do not get it   at all

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