Here is a worked example of a stoichiometry problem.
http://www.jiskha.com/science/chemistry/stoichiometry.html
If I have 30 glucose molecules, how many CO2 molecules will that produce?
2 answers
The equation for the complete combustion of methane is CH4(g) + 2O2(g) → CO2(g) + 2H2O(g). If 4.00 g of CH4(g) react completely, how much water is expected?