Chemical reactions

At and 1 atm, dissociates into by according to the following equilibrium:

Calculate:
a) The values of the equilibrium constants and at this temperature.
b) The percentage of dissociation at and a total pressure of 0.1 atm.
Data: .

You have 87 g of silver nitrate, with purity, reacting with 50 mL of a hydrochloric acid solution, by mass concentration and density 1.07 g/mL, producing silver chloride and nitric acid, with a reaction yield of .
a) Write the chemical reaction and balance it if necessary.
b) Calculate the amount of silver chloride and nitric acid produced in the reaction.
c) Determine the amount of the excess reagent that does not react.
Atomic masses: H = 1; O = 16; N = 14; Cl = 35.5; Ag = 108.

How many grams of are needed to react with 120 g of to obtain ?