3. Chemical Reactions

Percent Yield

Multiple Choice
Gold 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 Choice
Which term refers to the error expressed as a percentage of the accepted value in a chemical experiment?
Multiple Choice
Which term is used to describe the measure of the efficiency of a chemical reaction?
Open Question
What is the percent yield of NH₃ if the reaction of 26.3 g of H₂ produces 79.0 g of NH₃?
Multiple Choice
Which of the following is the correct formula for percent error in a chemical experiment?
Multiple Choice
A 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?
Multiple Choice
Calculate 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 Choice
A student reacts 10.0 g of calcium carbonate (CaCO3) with excess hydrochloric acid (HCl) according to the equation: CaCO3(s) + 2 HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l). What is the theoretical yield of carbon dioxide (CO2) in grams?
1
views
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
6
views
Multiple Choice
If the theoretical yield of a reaction is 80.0 g and the percent yield is 95%, what is the actual yield?
Multiple Choice
Which of the following correctly describes how to calculate percent error in a chemical experiment?
Multiple Choice
In the context of percent yield, what is the term used to describe the maximum possible amount of product that can be obtained from a chemical reaction, based on the limiting reactant?
Multiple Choice
If 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 Choice
What is the percent yield if 50 grams of barium phosphate is expected, but only 40 grams is actually produced?
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)
2
views