Stoichiometry Practice Quiz
Test your knowledge of stoichiometry concepts with this practice quiz. Answer all questions to the best of your ability.
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1. What is the mole ratio of H2 to H2O in the reaction: 2H2 + O2 → 2H2O?
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1:1
2:1
1:2
2:2
2. If 10 grams of Na react with excess Cl2, how many grams of NaCl are produced? (Na + Cl2 → 2NaCl)
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3. Which reactant is the limiting reactant when 5 moles of H2 react with 2 moles of O2? (2H2 + O2 → 2H2O)
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H2
O2
Both are limiting
Neither is limiting
4. Complete the following table based on the balanced equation: N2 + 3H2 → 2NH3
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Rows
Given (mol)
Required (mol)
N2 to NH3
H2 to NH3
5. What is the theoretical yield (in grams) of CO2 when 20 grams of C2H5OH are combusted? (C2H5OH + 3O2 → 2CO2 + 3H2O)
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6. If the actual yield of a reaction is 25 grams and the theoretical yield is 30 grams, what is the percent yield?
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7. Balance the following chemical equation: ___Al + ___O2 → ___Al2O3
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Rows
Coefficient
Al
O2
Al2O3
8. In a reaction, 4 moles of A react with 5 moles of B to form C. If the balanced equation is A + 2B → C, how many moles of C can be formed?
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9. Choose the correct statement about limiting reactants.
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The reactant that is completely used up first
The reactant present in excess
The reactant that determines the amount of product formed
Both A and C
10. Briefly explain the steps you would take to solve a stoichiometry problem.
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