The reaction is :
AgCl + NaNO3 NaCl + AgNO3
Mass of AgCl = 14.55 g
Mass of NaNO3 = 8.5 g
Mass of NaCl = 5.85 g
Let mass of AgNO3 = x
According to law of mass of conservation ,mass of reactants = mass of products
Hence , 14.55 + 8.5 = x + 5.85
x = 17.2 g