Stoichiometry Quiz - Practice MCQs with Answers

Our stoichiometry quiz consists of 15 multiple-choice questions. Each time your questions will be different because they will be coming randomly from a question bank. Test your understanding by attempting this quiz and see how much you score! Topics include limiting reagents, theoretical yield, percent yield, mole ratios, and reaction stoichiometry.

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1. What is the empirical formula of a compound composed of 2.04 g of sulfur and 3.2 g of oxygen?

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2. If you have 1.5 moles of calcium nitrate (Ca(NO₃)₂), how many moles of nitrate ions are there?

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3. If 5.0 moles of Ca react with excess Cl₂ to form CaCl₂, what mass of CaCl₂ would be produced?

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4. The reaction for the decomposition of potassium chlorate is: 2KClO₃ → 2KCl + 3O₂ How many moles of O₂ can be produced from 3 moles of KClO₃?

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5. What volume of SO₂ at room temperature and pressure is produced when 9.7g of Zinc Sulfide (ZnS) reacts as follows: 2ZnS(s) + 3O₂(g) → 2ZnO(s) + 2SO₂(g)

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6. One mole of propane has the same:

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7. How many molecules of water are there in 12 g of ice?

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8. If four moles of SO₂ are oxidized to SO₃, how many moles of oxygen molecules are required?

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9. How many moles of oxygen gas (O2) are needed to combust 1 mole of methane (CH4)?

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10. What is the percentage composition of oxygen in water

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11.

If 20 g of NaOH (Molar mass = 40 g/mol) is dissolved in 500 mL of water, what is the molarity of the solution?

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12. How many moles of oxygen gas are required to completely react with 4 moles of ethane?

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13.

If 8.4 g of Mg reacts with HCl, how many liters of H₂ gas are produced at STP?

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14.

What volume of O₂ (at STP) is required to completely react with 2 moles of C₂H₆?

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15.

If 5 moles of CH₄ react with O₂, how many moles of CO₂ are produced?

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The average score is 41%

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