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Correct Answer: B
Correct Answer: B
Method / Topic: General Chemistry
The correct option matches the required rule and the given information.
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Correct Answer: B
Method / Topic: General Chemistry
A catalyst provides an alternative pathway with lower activation energy, increasing the rates of both forward and reverse reactions. It does not change ΔG, the equilibrium constant, the equilibrium composition, or the balanced stoichiometric equation. It helps the system reach equilibrium faster but does not move the equilibrium position. This result follows from the balanced chemical relationship and the stated conditions; no unstated biological assumption is needed. On MCAT chemistry problems, first identify the governing principle, write the relevant equation with units, and only then substitute values. Check whether the
prevents dosage, dilution, and preparation errors.
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PASSAGE 2 — HYDROGEN PEROXIDE DECOMPOSITION Hydrogen peroxide decomposes as 2H2O2(aq) → 2H2O(l) + O2(g). In one trial at 298 K and 1.00 atm, a catalyst causes a sample to release 24.6 mL of O2. Use R = 0.0821 L·atm·mol−1·K−1. In a separate kinetics experiment, the H2O2 concentration falls from 0.800 M to 0.400 M in 10 minutes and from 0.400 M to 0.200 M during the next 10 minutes. QUESTION 6: What is the principal effect of the catalyst on this reaction?
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Correct Answer: B
Method / Topic: General Chemistry
The correct option matches the required rule and the given information.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: General Chemistry
A catalyst provides an alternative pathway with lower activation energy, increasing the rates of both forward and reverse reactions. It does not change ΔG, the equilibrium constant, the equilibrium composition, or the balanced stoichiometric equation. It helps the system reach equilibrium faster but does not move the equilibrium position. This result follows from the balanced chemical relationship and the stated conditions; no unstated biological assumption is needed. On MCAT chemistry problems, first identify the governing principle, write the relevant equation with units, and only then substitute values. Check whether the
prevents dosage, dilution, and preparation errors.
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