Adapted by Nelson Nuñez-Rodriguez
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By David W. Ball
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| QUESTION | ANSWER |
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1. The box below shows a group of nitrogen and hydrogen molecules that will react to produce ammonia, NH3. What is the limiting reagent?
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1. Nitrogen is the limiting reagent. |
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3. Given the statement “20.0 g of methane is burned in excess oxygen,” is it obvious which reactant is the limiting reagent?
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3. Yes; methane is the limiting reagent. |
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5. Acetylene (C2H2) is formed by reacting 7.08 g of C and 4.92 g of H2. 2C(s) + H2(g) → C2H2(g)
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5. C is the limiting reagent; 4.33 g of H2 are left over. |
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7. Given the initial amounts listed, what is the limiting reagent, and how much of the other reactant is in excess? |
7. H2O is the limiting reagent; 25.9 g of P4O6 are left over. |
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9. To form the precipitate PbCl2, 2.88 g of NaCl and 7.21 g of Pb(NO3)2 are mixed in solution. How much precipitate is formed? How much of which reactant is in excess?
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9. 6.06 g of PbCl2 are formed; 0.33 g of NaCl is left over. |
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