Hydrochloric acid reacts with calcium to form hydrogen and calcium chloride. If 100 grams of hydrochloric acid reacts with 100 grams of calcium, what is the limiting reactant?

Question

2HCl + Ca --> CaCl2 + H2

Answer 1

This is a limiting reagent problem. Here is a worked example that will take care of all of your limiting reagent problems.
http://www.jiskha.com/science/chemistry/limiting_reagent_problem.html