---
title: "A student investigates the reaction between two gases, \\(\\text{A}(g)\\) and \\(\\text{B}(g)\\), that react to form \\(\\text{C}(g)\\) in a rigid \\(1.0\\text{ L}\\) container at a constant temperature according to the following equation:  \\[ a\\,\\text{A}(g) + \\text{B}(g) \\rightleftharpoons c\\,\\text{C}(g) \\]  The student introduces initial amounts of \\(\\text{A}(g)\\) and \\(\\text{B}(g)\\) into the container and measures the equilibrium concentrations of all species, recording the data in the table below.  | Species | Initial concentration (\\(\\text{M}\\)) | Equilibrium concentration (\\(\\text{M}\\)) | | :—: | :—: | :—: | | \\(\\text{A}(g)\\) | \\(0.60\\) | \\(0.20\\) | | \\(\\text{B}(g)\\) | \\(0.40\\) | \\(0.20\\) | | \\(\\text{C}(g)\\) | \\(0.00\\) | \\(0.40\\) |  Based on the data in the table, what is the value of the equilibrium constant, \\(K_c\\), for the reaction?"
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url: "https://nerd-notes.com/ubq/120293/"
date_modified: "2026-08-23T04:04:19+00:00"
---

# A student investigates the reaction between two gases, \(\text{A}(g)\) and \(\text{B}(g)\), that react to form \(\text{C}(g)\) in a rigid \(1.0\text{ L}\) container at a constant temperature according to the following equation:

\[ a\,\text{A}(g) + \text{B}(g) \rightleftharpoons c\,\text{C}(g) \]

The student introduces initial amounts of \(\text{A}(g)\) and \(\text{B}(g)\) into the container and measures the equilibrium concentrations of all species, recording the data in the table below.

| Species | Initial concentration (\(\text{M}\)) | Equilibrium concentration (\(\text{M}\)) |
| :—: | :—: | :—: |
| \(\text{A}(g)\) | \(0.60\) | \(0.20\) |
| \(\text{B}(g)\) | \(0.40\) | \(0.20\) |
| \(\text{C}(g)\) | \(0.00\) | \(0.40\) |

Based on the data in the table, what is the value of the equilibrium constant, \(K_c\), for the reaction?

A student investigates the reaction between two gases, \(\text{A}(g)\) and \(\text{B}(g)\), that react to form \(\text{C}(g)\) in a rigid \(1.0\text{ L}\) container at a constant temperature according to the following equation:

\[ a\,\text{A}(g) + \text{B}(g) \rightleftharpoons c\,\text{C}(g) \]

The student introduces initial amounts of \(\text{A}(g)\) and \(\text{B}(g)\) into the container and measures the equilibrium concentrations of all species, recording the data in the table below.

| Species | Initial concentration (\(\text{M}\)) | Equilibrium concentration (\(\text{M}\)) |
| :---: | :---: | :---: |
| \(\text{A}(g)\) | \(0.60\) | \(0.20\) |
| \(\text{B}(g)\) | \(0.40\) | \(0.20\) |
| \(\text{C}(g)\) | \(0.00\) | \(0.40\) |

Based on the data in the table, what is the value of the equilibrium constant, \(K_c\), for the reaction?

- **A.** \(4.0\)
- **B.** \(10\)
- **C.** \(20\)
- **D.** \(50\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120293/*