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Turn your stoichiometry notes into a chemistry quiz in minutes

Upload a lecture PDF, a set of slides or typed notes. DeckOwl writes multiple-choice, true/false and short-answer questions, each with an explanation of the reasoning.

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Why stoichiometry practice works best as a quiz

Working through a chemistry stoichiometry quiz shows quickly which step breaks down: balancing the equation, converting grams to moles, or applying the mole ratio. Rereading notes rarely reveals those gaps, but a question that asks for a numeric answer does.

Start with balancing equations, since every later step depends on the coefficients
Convert to moles before using a mole ratio, and check units at each step
Identify the limiting reagent before calculating any product amount
Compare your answer to percent yield or the theoretical value to catch arithmetic slips

Example stoichiometry quiz questions

In the reaction 2H2 + O2 → 2H2O, how many moles of water form from 2.00 mol of H2?2.00 mol of water. The mole ratio of H2 to H2O is 2:2, so the moles are equal.

For 2Al + 3Cl2 → 2AlCl3, which reactant is limiting when 2 mol Al reacts with 2 mol Cl2?Cl2 is limiting. Two moles of Al would need 3 mol Cl2, but only 2 mol is available.

A reaction has a theoretical yield of 10.0 g and produces 8.5 g. What is the percent yield?85%. Percent yield is actual yield divided by theoretical yield, multiplied by 100.

How many moles are in 36.0 g of water (molar mass 18.0 g/mol)?2.00 mol. Divide the mass by the molar mass to convert grams to moles.

What coefficient goes in front of O2 when C3H8 + O2 → CO2 + H2O is balanced?5. The balanced equation is C3H8 + 5O2 → 3CO2 + 4H2O, so the oxygen atoms on each side total 10.

Generate the full set

Multiple choice, true/false and short answer

Mix question types so you practice both recognizing and writing out mole ratios, limiting reagents and percent yield.

Explanations for every answer

Each question shows the worked step that gives the correct answer, so a wrong guess becomes a lesson about where the calculation went off track.

Built from your own material

Questions come from the chapter or lab handout you upload, so the quiz matches what your instructor is actually teaching.

How it works

Upload your notes

Add a PDF, DOCX, PPTX, plain text or a photo of a textbook page. Photos are read with text recognition.

Choose a question type

Pick multiple choice, true/false or short answer, or combine them in one quiz on stoichiometry topics.

Study and review

Take the quiz in your browser, read the explanations for anything you missed, and repeat the questions you got wrong.

Short-answer questions help most with multi-step problems, because you have to produce the number yourself rather than spot it among choices. True/false items work well for rules such as the difference between theoretical and actual yield.

DeckOwl builds the quiz from the material you upload, so the questions follow your course's own examples. Free accounts can generate three sets a month and study them in the browser. Plus and Pro add exports for offline use and LMS import.

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Frequently asked questions

What order should I learn stoichiometry topics in?

Start with balancing chemical equations, then molar mass and mole conversions, then mole ratios. Limiting reagents and percent yield come after those are comfortable.

How many practice problems should I do before an exam?

Most students find that a few sets of mixed problems over several days works better than one long session. Focus extra time on the question types you get wrong.

Can I export a stoichiometry quiz to PDF or DOCX?

Yes, PDF and DOCX export is included in the Plus plan, which is $39 per year or $7.99 per month. The Free plan lets you study quizzes in the browser without exports.

Can I import a quiz into Moodle or another LMS?

Moodle XML and QTI 2.1 export are included in the Pro plan at $14.99 per month. Students with a school email get 40% off.

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Keep exploring the topic

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