by alex
Dive into the world of stoichiometry, where the magic of chemical equations and quantitative relationships between reactants and products come to life. This quiz will challenge your understanding of concepts such as mole ratios, limiting reactants, and theoretical yields. Sharpen your pencils and get ready to balance those equations! Good luck!
Stoichiometry Quiz Questions Overview
1. What is the mole ratio of hydrogen to oxygen in the formation of water (H2O)?
1:1
2:1
1:2
2:2
2. In the reaction 2Al + 3Cl2 → 2AlCl3, how many moles of AlCl3 are produced from 4 moles of Al?
2 moles
4 moles
6 moles
8 moles
3. What is the limiting reactant when 4 moles of H2 react with 2 moles of O2 to form water?
H2
O2
H2O
None
4. What is the theoretical yield of CO2 if 5 moles of C2H6 are burned in excess oxygen?
5 moles
10 moles
15 moles
20 moles
5. How many grams of NaCl are produced when 2.5 moles of Na react with excess Cl2?
58.44 g
116.88 g
146.10 g
292.20 g
6. What is the percent yield if 15 grams of product are obtained when the theoretical yield is 20 grams?
50%
60%
75%
80%
7. In the reaction N2 + 3H2 → 2NH3, how many moles of NH3 are produced from 6 moles of H2?
2 moles
4 moles
6 moles
8 moles
8. How many liters of O2 are needed to react with 5 liters of H2 at STP to form water?
2.5 liters
5 liters
7.5 liters
10 liters
9. What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?
CH2O
C2H4O2
CH4O
C3H6O3
10. In the reaction 4Fe + 3O2 → 2Fe2O3, how many grams of Fe2O3 are produced from 8 moles of Fe?
319.38 g
638.76 g
159.69 g
479.07 g
