---
title: "The initial rates of the reaction represented below were measured at \\(298\\text{ K}\\) for several different initial concentrations of \\(\\text{NO}(g)\\) and \\(\\text{Br}_2(g)\\).  \\[ 2\\text{NO}(g) + \\text{Br}_2(g) \\rightarrow 2\\text{NOBr}(g) \\]  | Trial | Initial \\([\\text{NO}]\\) (\\(\\text{M}\\)) | Initial \\([\\text{Br}_2]\\) (\\(\\text{M}\\)) | Initial rate of formation of \\(\\text{NOBr}\\) (\\(\\text{M}\\cdot\\text{s}^{-1}\\)) | | :—: | :—: | :—: | :—: | | \\(1\\) | \\(0.10\\) | \\(0.20\\) | \\(2.4 \\times 10^{-3}\\) | | \\(2\\) | \\(0.20\\) | \\(0.20\\) | \\(9.6 \\times 10^{-3}\\) | | \\(3\\) | \\(0.10\\) | \\(0.40\\) | \\(4.8 \\times 10^{-3}\\) |  Based on the experimental data, what is the value of the rate constant, \\(k\\), for the reaction at \\(298\\text{ K}\\)?"
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date_modified: "2026-08-23T05:02:05+00:00"
---

# The initial rates of the reaction represented below were measured at \(298\text{ K}\) for several different initial concentrations of \(\text{NO}(g)\) and \(\text{Br}_2(g)\).

\[ 2\text{NO}(g) + \text{Br}_2(g) \rightarrow 2\text{NOBr}(g) \]

| Trial | Initial \([\text{NO}]\) (\(\text{M}\)) | Initial \([\text{Br}_2]\) (\(\text{M}\)) | Initial rate of formation of \(\text{NOBr}\) (\(\text{M}\cdot\text{s}^{-1}\)) |
| :—: | :—: | :—: | :—: |
| \(1\) | \(0.10\) | \(0.20\) | \(2.4 \times 10^{-3}\) |
| \(2\) | \(0.20\) | \(0.20\) | \(9.6 \times 10^{-3}\) |
| \(3\) | \(0.10\) | \(0.40\) | \(4.8 \times 10^{-3}\) |

Based on the experimental data, what is the value of the rate constant, \(k\), for the reaction at \(298\text{ K}\)?

The initial rates of the reaction represented below were measured at \(298\text{ K}\) for several different initial concentrations of \(\text{NO}(g)\) and \(\text{Br}_2(g)\).

\[ 2\text{NO}(g) + \text{Br}_2(g) \rightarrow 2\text{NOBr}(g) \]

| Trial | Initial \([\text{NO}]\) (\(\text{M}\)) | Initial \([\text{Br}_2]\) (\(\text{M}\)) | Initial rate of formation of \(\text{NOBr}\) (\(\text{M}\cdot\text{s}^{-1}\)) |
| :---: | :---: | :---: | :---: |
| \(1\) | \(0.10\) | \(0.20\) | \(2.4 \times 10^{-3}\) |
| \(2\) | \(0.20\) | \(0.20\) | \(9.6 \times 10^{-3}\) |
| \(3\) | \(0.10\) | \(0.40\) | \(4.8 \times 10^{-3}\) |

Based on the experimental data, what is the value of the rate constant, \(k\), for the reaction at \(298\text{ K}\)?

- **A.** \(0.12\text{ M}^{-1}\cdot\text{s}^{-1}\)
- **B.** \(1.2\text{ M}^{-2}\cdot\text{s}^{-1}\)
- **C.** \(6.0\text{ M}^{-3}\cdot\text{s}^{-1}\)
- **D.** \(12\text{ M}^{-2}\cdot\text{s}^{-1}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/121399/*