Here is a worked example of how to solve limiting reagent problems. Just follow the steps.
http://www.jiskha.com/science/chemistry/limiting_reagent_problem.html
based on the following chemical equation
HCN+O2 yields N2+CO2+H20
identify the limiting reactants and the mass of N2 produced when 100.0g of HCN react with 100.0g of O2.
a. the limiting reactant is HCN and 25.9g of N2 are produced
b. the limiting reactant is O2 and 35.0g of N2 are produced
c. the limiting reactant is HCN and 51.8g of N2 are produced
d. both reactants are consumed completely
2 answers
Got it....thanks Dr Bob