For the Reaction X₂ + Y + Z $\rarr$ XY + XZ, It Is Found That the Rate Equation

question 42

Multiple Choice

For the reaction X₂ + Y + Z $\rarr$ XY + XZ, it is found that the rate equation is rate = k [X₂][Y]. Why does the concentration of Z have no effect on the rate

• A) The concentration of Z is very small and the others are very large.
• B) Z must react in a step after the rate determining step.
• C) Z is an intermediate.
• D) The fraction of molecules of Z that have very high energies is zero.
• E) The activation energy for Z to react is very high.

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