Open Question
What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3?
3. Chemical Reactions
Percent Yield
Back3. Chemical Reactions
Percent Yield
- Multiple Choice
The reduction of iron (III) oxide creates the following reaction:
Fe2O3 (s) + 3 H2 (g) → 2 Fe (s) + 3 H2O (g)
If the above reaction only went to 75% completion, how many moles of Fe2O3 were require to produce 0.850 moles of Fe?
- Multiple ChoiceGold metal can be reduced from the compound gold sulfide by hydrogen gas according to the following balanced chemical equation:
Au2S3 + 3 H2 → 3 H2S + 2 Au
How many grams of Au can be produced from 500.20 g of Au2S3 and 5.67 g H2? - Multiple ChoiceCyanogen (CN)2 has been observed in the atmosphere of Titan, Saturn’s largest moon, and in the gases of interstellar nebulas. On Earth, it is used as a welding gas and a fumigant. In its reaction with fluorine, carbon tetrafluoride (CF4) and nitrogen trifluoride (NF3) gases are produced:
(CN)2 + 7 F2 → 2 CF4 + 2 NF3
What is the percent yield of the reaction if 45.0 g of CF4 are isolated from the reaction between 75.0 g each of (CN)2 and F2?
- Multiple Choice
For the following chemical reaction 53.1 g HBrO4 is mixed with 25.8 g Li2CO3. Determine the percent yield if 7.17 g CO2 are produced.
2 HBrO4 (aq) + Li2CO3 (aq) → H2O (l) + CO2 (g) + 2 LiBrO4 (aq)
- Multiple Choice
Ammonia, NH3, can be created from the combining of H2 and N2 molecules. How many grams of ammonia are isolated when 10.0 g H2 reacts with excess N2 with a chemical reaction that has a 79.3% yield?
3 H2 + N2 → 2 NH3
- Open Question
What is the percent yield of HCl if 42.0 g of HCl are produced from the reaction of 62.0 g of PCl3?
- Multiple ChoiceCalculate the percent yield of CO2 when 28.16 g of CO2 are produced from the reaction of 4.000 moles of C8H18 with 4.000 moles of O2, given the reaction: 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O.
- Multiple ChoiceHydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the following equation: CH4(g) + H2O(g) → CO(g) + 3H2(g). In a particular reaction, 26.5 L of methane gas (measured at a pressure of 730 torr and a temperature of 298 K) is reacted. If the actual yield of hydrogen gas is 60.0 L, what is the percent yield of hydrogen gas?
- Multiple ChoiceIf the theoretical yield of NH₃ in a reaction is 40.0 g and the actual yield is 32.4 g, what is the percent yield?
- Multiple ChoiceIf the theoretical yield of CO2 for the reaction is 160 g and the actual yield is 146 g, what is the percent yield of CO2 for the reaction? Express your answer to three significant figures.
- Multiple ChoicePropane (C₃H₈) reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen. What is the percentage yield in this reaction?
- Multiple ChoiceWhat is the percent yield if 50 grams of barium phosphate is expected, but only 40 grams is actually produced?
- Multiple ChoiceWhen copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 1.50 g of copper was heated with excess sulfur to yield 1.56 g of copper(I) sulfide. What is the percent yield?
- Multiple ChoiceA 0.510 g sample of strontium chloride reacts with sodium carbonate to give 0.455 g of strontium carbonate. What is the percent yield of strontium carbonate in this reaction?