What mass of NaCl is required to precipitate all the Ag ions from 20 mL of .100 M AgNO3 solution

Answer 1

How many mols Ag^+ do you have?
mols Ag^+ = M x L = ?
mols NaCl = mols Ag^+ (look at the coefficients in NaCl + AgNO3 =>AgCl + NaNO3.
mass NaCl = mols NaCl x molar mass NaCl