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 its empirical formula if 100 grams of a compound comprises 53g of C, 6.9g of H, and 40.1g of O?

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2. What is the volume of 4 moles of nitrogen gas at STP?

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3. 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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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. If the percent yield of a reaction is 75%, and the theoretical yield is 20 grams, what is the actual yield?

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6. How many grams of water are produced when 1.0 mol of hydrogen reacts completely with excess oxygen?

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7. What is the mass of one mole of iodine molecules?

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8. The relative atomic mass of chlorine is 35.5. What is the mass of 2 moles of Chlorine gas?

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9. Which contains more atoms, 1 mole of Fe or 1 mole of H₂? 

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10. A flask contains 500 cm³ of SO₂ at STP. The mass of SO₂ in the flask is:

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11. What is the limiting reagent when 4 moles of H2 and 3 moles of O2 react to form water?

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

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How many grams of H₂O are formed from 8 g of H₂?

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

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15.

What does the coefficient in a balanced chemical equation represent?

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The average score is 44%

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