1.50 M solution of ammonium chloride was left in a beaker over spring break. Upon returning to the lab, 18.5 grams of solid ammonium chloride was left. We redissolved these crystals in water until we had 500.0 mL of solution. What was the concentration (molarity) of this new solution?

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.