What is the theoretical yield of a reaction if 25.0 grams of product were actually produced from a reaction that has a 88% yield?
A) 28.4
B) 22.0
C) 3.52
D) 352
E) none of the above
Answer: A
Learn More :
Chemistry Chapter 8
- Hydrochloric acid reacts with barium hydroxide according to the equation: 2 HCl (aq) + Ba(OH)2 (aq) > BaCl2 (aq) + 1H2O (l) H= -118 kj Calculate the heat (in kJ) associated with the complete reaction of 18.2 grams of HCl (aq).
- Starting with 156 g Li2O and 33.3 g H2O, decide which reactant is present in limiting quantities. Given: Li2O + H2O ? 2 LiOH
- Consider a reaction of chemicals depicted as A + B ? C + D. Suppose reaction of 17.8 grams of A with 29.5 grams of B gave 24.7 grams of C. However, the theoretical yield of C for this reaction was 33.3 grams. What was the percent yield of chemical C?
- If the theoretical yield of the reaction below corresponds to 25.3 g and the percent yield of the reaction is known to be reproducibly 81.1%, calculate the actual yield. Given: Li2O + H2O ? 2 LiOH
- If the theoretical yield of the reaction below corresponds to 99.2 g and the actual yield was 60.9 g, calculate the percent yield. Given: Li2O +H2O ? 2 LiOH
- How many grams of water are needed to react with 27.2 grams of O? Given: Li2O + H2O ? 2 LiOH
- How many moles of water are needed to react with 2.2 moles of Li2O? Given: Li2O + H2O ? 2 LiOH
- Suppose a computer manufacturer can build circuit boards according to the following process: 12 resistors + 20 insulators + 8 memory chips ? 4 circuit boards. How many circuit boards could you make using 30 insulators, assuming you have enough of all the other parts?
- Consider the following equation: CO + 2 H2 ? CH3OH ?H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2.
- Consider the following reaction: 2 Mg + O2 ? 2 MgO ?H rxn = -1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg.
- The reaction of one mole of nitrogen gas with three moles of hydrogen gas releases 92 kJ of thermal energy to the surroundings. Which of the following is TRUE?
- Consider the reaction: 2 Al + 3Br2 ? 2 AlBr3 Suppose a reaction vessel initially contains 5.0 mole Al and 6.0 mole Br2. What is in the reaction vessel once the reaction has occurred to the fullest extent possible?
- How many grams of the excess reactant remain assuming the reaction goes to completion and that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 ? Na2SO4 + CuS
- What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? The actual amount of CuS produced was 3.05. Reaction: Na2S + CuSO4 ? Na2SO4 + CuS
- What is the theoretical yield in grams of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 ? Na2SO4 + CuS
- Which is the limiting reactant in the following reaction given that you start with 42.0 g of CO2 and 99.9 g KOH? Reaction: CO2 + 2KOH ? K2CO3 + H2O
- Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 ? Na2SO4 + CuS
- Which is the excess reactant in the following reaction given that you start with 15.5 g of Na2S and 12.1 g CuSO4? Reaction: Na2S + CuSO4 ? Na2SO4 + CuS
- A 24.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 3.85 g NH3. What is the percent yield for this reaction? Reaction: N2(g) + 3 H2(g) ? 2 NH3(g)
- Calculate the maximum number of grams of NH3 that can be produced by the reaction of 2.00 g of N2 with 3.00 g H2. Reaction: N2(g) + 3 H2(g) ? 2 NH3(g)
- How many moles of NH3 can be produced by the reaction of 2.00 g of N2 with 3.00 g H2? Reaction: N2(g) + 3 H2(g) ? 2 NH3(g)
- How many grams of the excess reactant are left over according to the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 ? 2Al2O3
- The reaction for the oxidation of NH3 is given as: 4 NH3 + 5 O2 ? 4 NO + 6 H2O Under certain conditions the reaction will proceed at 29.8% yield of NO. How many grams of NH3 must be made to react with excess oxygen to yield 70.5 g of NO?
- A sample of 8.5 g NH3 on oxidation produces 4.5 g of NO. Calculate the percent yield. Reaction: 4 NH3 + 5 O2 ? 4 NO + 6 H2O
- If 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 ? 2Al2O3