Express the equilibrium constant for the combustion of propane in the balanced chemical equation c3h8(g)+5o2((g)+4h2o(g)

According to the balanced equation:
C3H8(g) + 5O2(g) ↔ 3CO2(g) + 4 H2O (g)
      aA    + bB        ↔  cC          +    dD

according to K formula when:
K = concentration of the products / concentration of the reactants

   K = [C]^c[D]^d / [A]^a[B]^b
when [A],[B],[C]and[D] is the concentrations 
and a,b,c and d is the no of moles
∴ K = [CO2]^3[H2O]^4 / [C3H8] [ O2]^5

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !