Two students react 15.50g of Lead (II) nitrate with 3.81g of sodium chloride.

Predict the mass of the excess reactant left over when the reaction is complete.

2 answers

Here is a worked example of a limiting reagent problem. At the end of the example it shows how to solve for the excess reagent. Post back if you have any questions about the example.
http://www.jiskha.com/science/chemistry/limiting_reagent_problem.html
Thank you very much