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Limiting Reactant Practice Problems Quiz

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1. In a chemical reaction between reactant A and reactant B, if reactant A is completely consumed while reactant B has some amount left unreacted, which of the following statements is true about reactant A?

2. When 10.0 g of hydrogen reacts with 80.0 g of oxygen in the formation of water, which reactant is the limiting reactant? (Note: The molar mass of H is 1.01 g/mol, and O is 16.00 g/mol)

3. In the combustion of benzene (C6H6) with oxygen to produce carbon dioxide and water, if you start with 15 grams of benzene and an excess of oxygen, how can you determine the limiting reactant?

4. What is the significance of identifying the limiting reactant in a chemical reaction?

5. If 3.00 moles of nitrogen gas react with 6.02 moles of hydrogen gas to produce ammonia (NH3) according to the balanced equation N2 + 3H2 ⟶ 2NH3, what is the limiting reactant?

6. A student mixed 50 grams of calcium carbonate with 50 grams of hydrochloric acid to produce calcium chloride, water, and carbon dioxide. To determine the limiting reactant, the student should first:

7. In a synthesis reaction to produce water from hydrogen and oxygen, if you start with 2.0 grams of hydrogen and 32.0 grams of oxygen, which substance will be the limiting reactant, assuming complete reaction? The molar mass of hydrogen is 2.02 g/mol and oxygen is 32.00 g/mol.

8. When calculating the theoretical yield of a product in a chemical reaction, why is it important to identify the limiting reactant?

9. In a reaction where silver nitrate reacts with sodium chloride to produce silver chloride and sodium nitrate, if you have 0.5 moles of silver nitrate and 0.5 moles of sodium chloride, which reactant is the limiting reactant?

10. In a reaction to produce ammonia from nitrogen and hydrogen gases, if the reaction starts with an insufficient amount of hydrogen, what effect does this have on the amount of ammonia produced?