Percent Yield - Page 3
Questions
- White phosphorus, #"P"_4#, is an allotrope of phosphorus that reacts with fluorine gas to form gaseous phosphorus trifluoride. What is the mass of fluorine gas needed to produce #"120. g"# of phosphorus trifluoride if the reaction has a #78.1%# yield?
- Coal gasification is a process that converts coal into methane gas. If this reaction has a percent yield of 85.0%, how much methane can be obtained from 1250 g of carbon?
- A common laboratory preparation for small for quantities of #O_2# is to decompose #KClO_3# by heating: #2KClO_3 (s) -> 2KCl (s) + 3O_2 (g)#. If the decomposition of 2.00 g of #KCIO_3# gives 0.720 g of #O_2#, what is the percent yield for the reaction?
- Why does calcium carbonate undergo mass loss upon heating?
- Convert the mass of your limiting reactant to a number of moles.
- In the Haber process, #"30 L"# of #"H"_2# and #"30 L"# of #"N"_2# were used for a reaction which yielded only #50%# of the expected product. What will be the composition of gaseous mixture under these condition in the end?
- If the reaction of 77.0 grams of CaCN2 produces 27.1 grams of NH3, what is the percent yield? CaCN2+3H2O=>CaCO3+2NH3
- What is the percent yield for the following chemical reaction?
- Following reaction has a reaction yield of #75%#. In order to obtain #"25 g"# of carbon dioxide, what is the necessary amount of propane in moles? #"C"_3"H"_8 + "O"_2 -> "CO"_2 + "H"_2"O"# (unbalanced)
- What occurs to the theoretical yield if a sample is incompletely dried? What occurs to the reported yield?
- If the reaction of 40.8 grams of C6H6O3 produces a 39.0% yield, how many grams of H2O would be produced ? C6H6O3+6O2=>6CO2+3H2O
- Upon heating, calcium carbonate decomposes to produce calcium oxide and carbon dioxide. What is the theoretical yield of #CO_2# if 235.0 g #CaCO_3# is heated?
- When 14.0 g of calcium metal is reacted with water, 5.00 g of calcium hydroxide is produced. Using the following balanced equation, calculate the percent yield for the reaction?
- What is the percent yield for the reaction between 45.9 g of #NaBr# and excess chlorine gas to produce 12.8 g of #NaCl# and an unknown quantity of bromine gas?
- For the reaction 2S(s) + 3O2(g) →2 SO3(s) 2.0 moles of sulfur are placed in a container with an excess of oxygen and 1.7 moles of SO3 are collected. What is the percentage yield?
- Stoichiometry predicts that the yield of beryllium chloride is 10.7 grams. If my actual yield was 7.6 grams, what was my percent yield?
- Is percent yield always less than 100?
- Given the following, how many grams of water could be produced in this reaction? What is the limiting reactant? If 8.7 g of water are produced, what is the percent yield?
- Starting with 1.56 g of salicylic acid, a student prepares 1.75 g of aspirin. If the calculated mass of aspirin is 1.88 g, what is the percent yield?
- Why is magnesium polished before it is ignited?