100 ml each of 1M AgNO3 and 1M NaCl are mixed. The nitrate ion concentration in the resulting solution is

nNaCl = 0.1  1 mole          1mole                                 1 mole0.1 mole        0.1 mole                                  XX=0.1 molesfinal vol. of the solution = (100+100) = 200ml  1 mole              1mole      1mole 0.5M                                   X