The Second-Order Reaction 2 Mn(CO)₅ → Mn₂(CO)₁₀,has a Rate Constant

question 127

Multiple Choice

The second-order reaction 2 Mn(CO) ₅ → Mn₂(CO) ₁₀,has a rate constant equal to 3.0 × 10⁹ M^-1 s^-1 at 25°C.If the initial concentration of Mn(CO) ₅ is 5.0 × 10^-5 M,how long will it take for 90.% of the reactant to disappear?

• A)1.7 × 10^-15 s
• B)1.9 × 10^-14 s
• C)6.0 × 10^-5 s
• D)1.5 × 10² s

---

Definitions:

First-order

Typically refers to the simplest form of a mathematical model or differential equation, indicating that it involves only the first derivatives or linear terms.

Stock Sales

The process or activity of selling shares of a company on the stock market.

Quadratic Trend Analysis

A statistical method used to determine if a quadratic relationship exists between a dependent variable and an independent variable.

Exponential Smoothing

A time series forecasting method for univariate data that applies weighted averaging of past observations, where the weights decrease exponentially over time.