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.

---

Definitions:

Front-end Ratio

A financial ratio that compares a person’s gross monthly income to his or her monthly housing costs.

Housing Expenses

Costs associated with owning or renting a living space, including mortgage or rent, utility bills, property taxes, and maintenance fees.

APR

The Annual Percentage Rate, which reflects the cost of borrowing on a yearly basis and includes interest and other charges.

Mortgage

A loan secured by real estate property, commonly used to purchase a home.