What is the mass of the precipitate formed when 50 mL of 16.9% solution of `AgNO_(3)` is mixed with 50 mL of 5.8% NaCl solution?

What is the mass of the precipitate formed when 50 mL of 16.9 % (w//v ) solution of Ag NO_(3) is mixed with 50 mL of 5.8 % (w/v) NaCl solutions (Ag = 107.3 ,N=14,O=16 ,Na=23 ,Cl=35.5)

What will be the pH of a solution formed by mixing 50 mL of 0.5 M HCl solution and 150 mL of 0.5 M NaOH solution and 300 mL H_(2) O ?