by millie.skiles
Dive into the world of stoichiometry, where the magic of chemical equations and quantitative relationships unfolds. Whether you’re calculating mole ratios or determining limiting reactants, this quiz will challenge your understanding and sharpen your skills in this fundamental area of chemistry. Ready to test your knowledge and see how well you can balance the scales of chemical reactions? Let’s get started!
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
Stoichiometry Quiz Questions Overview
1. What is the mole ratio of hydrogen to oxygen in the reaction 2H₂ + O₂ → 2H₂O?
1:1
2:1
1:2
2:2
2. In the reaction 4Fe + 3O₂ → 2Fe₂O₃, how many moles of Fe₂O₃ are produced from 8 moles of Fe?
2 moles
4 moles
6 moles
8 moles
3. What is the limiting reactant when 5 moles of H₂ react with 3 moles of N₂ in the reaction 3H₂ + N₂ → 2NH₃?
H₂
N₂
NH₃
None
4. How many grams of CO₂ are produced from 44 grams of C₆H₁₂O₆ in the reaction C₆H₁₂O₆ → 6CO₂ + 6H₂O?
44 grams
88 grams
132 grams
264 grams
5. What is the percent yield if 50 grams of product is obtained from a reaction with a theoretical yield of 60 grams?
50%
75%
83.33%
100%
6. If 2 moles of A react with 3 moles of B to produce 1 mole of C, what is the mole ratio of A to C?
1:1
2:1
1:2
3:1
7. In the reaction 2Na + Cl₂ → 2NaCl, how many grams of NaCl are produced from 23 grams of Na?
23 grams
46 grams
58.5 grams
117 grams
8. What is the empirical formula of a compound containing 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?
CH₂O
C₂H₄O₂
C₃H₆O₃
CH₄O
9. In the reaction 2KClO₃ → 2KCl + 3O₂, how many grams of O₂ are produced from 245 grams of KClO₃?
32 grams
48 grams
96 grams
122.5 grams
10. What is the limiting reactant when 10 grams of H₂ react with 50 grams of O₂ in the reaction 2H₂ + O₂ → 2H₂O?
H₂
O₂
H₂O
None
11. What is the theoretical yield of NH₃ in grams when 14 grams of N₂ react with excess H₂ in the reaction N₂ + 3H₂ → 2NH₃?
17 grams
34 grams
51 grams
68 grams
12. In the reaction 2Al + 3Cl₂ → 2AlCl₃, how many moles of AlCl₃ are produced from 1 mole of Al?
0.5 moles
1 mole
1.5 moles
2 moles
13. What is the percent composition of carbon in C₂H₆?
20%
40%
60%
80%
14. How many grams of H₂O are produced from 10 grams of H₂ in the reaction 2H₂ + O₂ → 2H₂O?
10 grams
20 grams
90 grams
180 grams
15. What is the empirical formula of a compound containing 85.7% carbon and 14.3% hydrogen by mass?
CH
CH₂
CH₃
CH₄
16. In the reaction 2KClO₃ → 2KCl + 3O₂, how many grams of KCl are produced from 245 grams of KClO₃?
122.5 grams
150 grams
245 grams
300 grams
17. What is the limiting reactant when 4 moles of A react with 5 moles of B in the reaction A + 2B → AB₂?
A
B
AB₂
None
18. How many grams of CO₂ are produced from 22 grams of C₂H₆ in the reaction 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O?
22 grams
44 grams
66 grams
88 grams
19. What is the percent yield if 40 grams of product is obtained from a reaction with a theoretical yield of 50 grams?
50%
60%
80%
100%
20. In the reaction 2H₂ + O₂ → 2H₂O, how many moles of H₂O are produced from 5 moles of H₂?
2.5 moles
5 moles
10 moles
15 moles
We recommend that you do not leave the page that you are taking this quiz in. Stay honest 🙂
