What is the concentration of nitrate ions if equal volumes of 0.1 M AgNO3 and 0.1 M NaCl are mixed together ?

AgNO3+NaCl→AgCl+NaNO3  1mole    1mole             1 mole0.1  M AgNO3 will react  with 0.1  M  NaCl  to  form  0.1 M  NaNO3. conc.  of NO3−  =  0.12  =0.05 M(since  NaNO3→Na++NO3-)