posted by .

what is the percent yield if 27 g of h20 obtained when 33 g of c3h8 reacts with 56 L of 02 at STP.The secong product of reaction is CO2

  • chem -

    This is a limiting reagent problem. I know that because amounts are given for BOTH reactants.
    C3H8 + 5O2 ==> 3CO2 + 4H2O

    mols C3H8 = grams/molar mass
    mols O2 = L/22.4 = ?

    Convert mols C3H8 to mols H2O
    Convert mols O2 to mols H2O.
    It is likely these two values will not be the same which means one of them must be wrong. The correct value in limiting reagent problems is ALWAYS the smaller value and the reagent producing that value is the limiting reagent. Convert the smaller value to grams (g = mols x molar mass). This is the theoretical yield (TY)
    The actual yield (AY) is 27g from the problem.
    %yield = (AY/TY)*100 = ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Hi can you help me balance these equations?
  2. Chemistry

    Stoichiometry-I have the basic strategy, but am still stuck on how to do them.example...propane burns in oxygen according to the following reaction C3H8 + O2 produces CO2 + H20 a. How many moles of CO2 are formed when 2.8 g of propane …
  3. Chemistry

    When 4.0 mol of CCl4 reacts with an excess of HF, 3.0 mol of CCl2F2 (Freon) is obtained. The equation for the reaction is CCl4(l) + 2HF(g) --> CCl2F2(l) + 2HCl9g) State which of the statements are true about the reaction and make …
  4. Chem

    Could someone please walk me through step by step on how to do this. Propane (C3H8) burns in oxygen to produce carbon dioxide and water. C3H8(g) + 5 O2(g) 3 CO2(g) + 4 H2O(g) Calculate the mass of CO2 that can be produced if the reaction …
  5. chemistry

    supposed the theoritical yield in a reaction is 68.8g, and the percent yield is 66.0%, what is the actual yield of product obtained?
  6. Chem- Percent Yield

    When HgO is heated, it decomposes into elemental mercury and diatomic oxygen gas. If 42.9 g of Hg is obtained from 70.1 g of the mercuric oxide, what is the percent yield of the reaction?
  7. chemistry

    In a combustion reaction, propane (C3H8) reacts with oxygen. How many moles of CO2 can be produced when 2.25 mol of C3H8 react?
  8. chem

    In a chemical reaction, A and B reacts to form D. C is the intermediate product of this reaction. Percent yield of the reaction A+B->C is 50% and the percent yield of the reaction C->D is 90%. How many moles of D can be produced …
  9. Chemistry (Check and Help)

    Upon the combustion of propane, C3H8, 150. g of propane was reacted with excess oxygen gas. A. Determine the limiting reactant if the water is the product of interest. B. Determine the number of grams of water produced. C. Calculate …
  10. chemistry

    2.2. Billions of kilograms of urea, are produced annually for use as a fertilizer. The reaction used is given below. NH3(g) + CO2(g) → CO(NH2)2(s) + H2O(l) The typical starting reaction mixture has a 3:1 mole ratio of NH3 to …

More Similar Questions