When sodium is heated with sulfur,sodium sulfide is product. What mass of sodium sulfide can be formed by heating 12.8 g of sulfur with 9.2g of sodium?

Answer 1

This is a limiting reagent problem; I know that because amounts are given for BOTH reactants. Here is a worked example of a limiting reagent problem. Just follow the steps. It's too dark to read on my screen; hope you have better luck. Let me know if you can't read it.
http://www.jiskha.com/science/chemistry/limiting_reagent_problem.html