Adapted by Nelson Nuñez-Rodriguez
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By David W. Ball
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| QUESTION | ANSWER |
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1. Think back to the pound cake recipe. What possible conversion factors can you construct relating the components of the recipe? |
1. are two conversion factors that can be constructed from the pound cake recipe. Other conversion factors are also possible. |
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3. What are all the conversion factors that can be constructed from the balanced chemical reaction 2H2(g) + O2(g) → 2H2O(ℓ)?
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3. and their reciprocals are the conversion factors that can be constructed. |
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5. Given the chemical equation Na(s) + H2O(ℓ) → NaOH(aq) + H2(g)
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5.
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7. For the balanced chemical equation 6H+(aq) + 2MnO4−(aq) + 5H2O2(ℓ) → 2Mn2+(aq) + 5O2(g) + 8H2O(ℓ)how many molecules of H2O are produced when 75 molecules of H2O2 react? |
7. 120 molecules |
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9. Given the balanced chemical equation Fe2O3(s) + 3SO3(g) → Fe2(SO4)3how many molecules of Fe2(SO4)3 are produced if 321 atoms of S are reacted? |
9. 107 molecules |
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11. For the balanced chemical equation Fe2O3(s) + 3SO3(g) → Fe2(SO4)3suppose we need to make 145,000 molecules of Fe2(SO4)3. How many molecules of SO3 do we need? |
11. 435,000 molecules |
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13. Construct the three independent conversion factors possible for these two reactions:
Why are the ratios between H2 and O2 different? The conversion factors are different because the stoichiometries of the balanced chemical reactions are different. |
13. a.
b. |
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