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This quiz contains 5 questions from a mix of 1 subtopics.
What is the percentage yield of a reaction?
the number of atoms that do not end up as useful products
a measure of the amount of starting materials that end up as useful products
the actual yield of a reaction compared to the maximum theoretical yield
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Suggest three reasons why the percentage yield of a chemical reaction may be less than 100%.
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While preparing to carry out the reaction below, a student calculated the maximum theoretical mass of carbon dioxide (CO2) she could produce to be 12.0 g.
CH4 + 2O2 ➔ CO2 + 2H2O
However, during the experiment, only 9.78 g of carbon dioxide (CO2) was produced.
What was the percentage yield of the reaction? Give your answer to 1 decimal place.
%
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While preparing to carry out the reaction below, a student calculated the maximum theoretical mass of calcium oxide (CaO) he could produce to be 0.300 kg.
CaO + 2HCl ➔ CaCl2 + H2O
However, during the experiment, only 66.0 g of calcium oxide (CaO) was produced.
What was the percentage yield of the reaction?
%
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A student performed the reaction below and obtained 1.30 g of sodium chloride (NaCl). The student's percentage yield was 73.0%.
2Na + Cl2 ➔ 2NaCl
Calculate the student's theoretical yield, in g. Give your answer to 3 significant figures.
g
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