AP Chemistry: Stoichiometry
Stoichiometry is the arithmetic the rest of AP Chemistry rests on. This quiz covers mole ratios from balanced equations, finding the limiting reactant, percent yield, and working an empirical formula out of mass percentages.
The questions are calculation-first: you are given masses and molar masses and asked for a number, the way the exam does it.
Every numerical answer here was recomputed by hand before publication — two questions were rewritten because the original figures did not hold up.
Start quiz →
Opens in a new tab on Cletica
Sample questions3 of 12 shown
Q1
In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water are produced from 3 moles of O₂?
Q2
Consider the reaction: 4Al + 3O₂ → 2Al₂O₃. If 8 moles of Al and 5 moles of O₂ are available, which is the limiting reactant?
Q3
An empirical formula shows the _____ whole-number ratio of atoms in a compound.
What This Quiz Covers
- Mole ratios from balanced equations
- Identifying the limiting reactant
- Percent yield and what lowers it
- Empirical formulas from mass percent
- Molecular formula from empirical formula
- Excess reactant remaining after reaction
Cletica
Want to create your own quiz?
Build surveys and quizzes, share with anyone, collect responses — free to start.
Try Cletica for free →