Fe(S)+ 2 HCl(ag) --> FeCL2(ag)+ H2(g

Question

What mass of H2 (g) is produced from the reaction of 5.2 Fe(s) with excess hydrochloric acid?

Answer 1

Here is a simple stoichiometry problem I've posted as an example. Just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html

Answer 2

.094