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. How many moles of NH₃ can be produced from 3 moles of N₂ in the reaction: N₂ + 3H₂ → 2NH₃?

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3. If 10 moles of NO₂ decompose to form N₂O₄, how many moles of N₂O₄ are produced?

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

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5. The actual yield is lesser than the theoretical yield because:

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6. 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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7. Which of the following compounds contains the highest percentage by mass of nitrogen?

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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. The Avogadro's constant is the number of:

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

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11. Which unit is not typically used in stoichiometry calculations?

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12.

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

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14.

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

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15.

How many grams of H₂O are formed from 4 moles of H₂?

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The average score is 44%

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