5.)
for the balanced equation shown below, if the reaction of 40.8 grams of
c6h603 produces a 39.0% yield, how many grams of h2o would be produced? (hint
work backwards to find actual yield! )

amount of H₂O = 6.825 g

Explanation:

Data Given:

mass of C₆H₆O₃ = 40.8 g

percent yield = 39.0 %

amount of H₂O = ?

Solution:

First we have to write the complete reaction

             C₆H₆O₃ + 6 O₂ > 6 CO₂ + 3 H₂O

So, if we look at the reaction

             C₆H₆O₃ + 6 O₂ > 6 CO₂ + 3 H₂O

               1 mol                                              3 mol

From the above reaction we come to know that C₆H₆O₃ and H₂O are in 1 : 3 mole ration that is one mole of C₆H₆O₃ produce 3 moles of H₂O

As the percent yield is 39% so it means that all the C₆H₆O₃ has not used in the reaction and Oxygen is limiting reagent.

To Know the Theoretical yield of H₂O we have to convert moles to mass

molar mass of  C₆H₆O₃ = 126 g/mol

molar mass of H₂O = 18 g/mol

Now

               C₆H₆O₃       +      6 O₂ > 6 CO₂  +   3 H₂O

           1 mol  (126 g/mol)                                          3 mol (18 g/mol)

                  126 g                                                              54 g

Now come to know that if 126 g of C₆H₆O₃ produce  54 g of H₂O then wat mass of water will be produce by 40.8 g of C₆H₆O₃.

apply unity formula

              126 g of C₆H₆O₃  ≅ 54 g of H₂O

              40.8 g of C₆H₆O₃ ≅ X g of H₂O

By cross multiplication:

             mass of H₂O = 40.8 g x 54 g / 126 g

             mass of H₂O = 17.5 g

To find the actual mass of H₂O

formula will be used

         percent yield of H₂O = actual yield / theoretical yield x 100

Rearrange the above formula

      actual yield = (percent yield of H₂O / theoretical yield)/100 . . . . . (1)

Put values in equation 1

     actual yield of H₂O = (39 x  17.5 g ) x 100

     actual yield H₂O = (682.5 g ) x 100

     actual yield H₂O = 6.825 g

So Amount of H₂O  produce = 6.825 g

"the periodic table is arranged in order of atomic number."

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.