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 mass of sodium sulfate (Na₂SO₄) will be formed from 23.0 g of sodium (Na) assuming an excess of sulfuric acid?

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2. The empirical formula of a compound is CH₂O, and its molar mass is 180 g/mol. What is its molecular formula?

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3. If 2.0 moles of nitrogen gas react with 6.0 moles of hydrogen gas to form ammonia: N₂ + 3H₂ → 2NH₃, how many moles of ammonia can be produced?

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4. How many moles of sodium hydroxide are required to react completely with 0.5 moles of sulfuric acid, according to: 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O?

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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. One mole of ethanol and one mole of ethane have an equal:

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8. When one mole of each of the following is completely burnt in oxygen, which will give the largest mass of CO₂?

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9. What is the mass of aluminum in 204g of aluminum oxide, Al₂O₃?

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10. How many molecules are there in one mole of H₂O?

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11. In the reaction N2 + 3H2 → 2NH3, how many grams of NH3 are formed from 14 g of N2?

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12. If 10 g of HCl reacts with excess NaOH, how many grams of NaCl are formed?

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13.

What is the percent yield if the theoretical yield is 50 g and the actual yield is 45 g?

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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.

What does the coefficient in a balanced chemical equation represent?

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The average score is 38%

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