90. Solving a chemistry problem

3. It has been established that titration of 20.00 ml of AgNO3 solution requires 21.00 ml of NH4SCN solution. 30.00 ml of AgNO3 solution was added to a sample of 0.1173 g of NaCl, and 3.20 ml of NH4SCN solution was used for titration: excess of Ag. Calculate the molar concentration of AgNO3 and NH4SCN solutions, as well as T(AgNO3/Cl ).