what is the limiting reagent in a mixture of 1g of Fe(NH4)2(SO2)2.6H20 and 5ml of 1M H2C2O4?
Write the equation and balance it.
Using stoichiometry, calculate moles of the product formed using one of the reactants. Do the same for the other reactant. The correct value for the moles of product formed will be the smaller of the two and the reagent producing that value will be the limiting reagent. Here is a worked example of a stoichiometry problem.
http://www.jiskha.com/science/chemistry/stoichiometry.html