Question

What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.750 L of 0.290 M NaI? Assume the reaction goes to completion.

Answer 1

This is a limiting reagent problem; I know that because amounts for BOTH reactants are given. Here is a worked example of a limiting reagent problem. It will work all of them for you so print these instructions.
http://www.jiskha.com/science/chemistry/limiting_reagent_problem.html

Answer 2

19.4g