When sodium Metal is dropped into water, all the metal reacts in the equation shown below. What mass of hydrogen is liberated from a 46.0 gram piece of sodium? 2Na(s)+2H2O(I) > 2NaOH(aq)+H2(g)

Answer 1

Here is a worked example of a stoichiometry problem. Just follow the steps. This will work all of your stoichiometry problems.
http://www.jiskha.com/science/chemistry/stoichiometry.html