posted by Anonymous .
determine the mass of CO2 produced when 76.8g of CaO is reacted with 50.0 g of C acording to the unbalanced equation...
CaO + C ==> CaC2 CO2
after i balanced the equation i got
2CaO +5C ==> 2CaC2 +CO2
This is a limiting reagent problem. I know that when I see that BOTH reactants are given. I work these problems by solving two simple stoichiometry problems (simple meaning they are not limiting reagent problems.).
First you calculate the moles CO2 produced from the CaO. Second you determine the moles of CO2 produced from the C. In limiting reagent problems, the moles of product will be different and the correct answer is ALWAYS the smaller value. The reagent producing that value is the limiting reagent. Here is a link to solving simple stoichiometry problems.