---
title: "The gas-phase reaction between \\(\\text{A}_2\\) and \\(\\text{B}_2\\) to form \\(\\text{AB}\\) is represented by the balanced equation below.  \\[ \\text{A}_2(g) + \\text{B}_2(g) \\rightleftharpoons 2\\text{AB}(g) \\]  A mixture of \\(\\text{A}_2(g)\\), \\(\\text{B}_2(g)\\), and \\(\\text{AB}(g)\\) reaches chemical equilibrium in a rigid \\(1.0\\text{ L}\\) container at a constant temperature where \\(K_c = 4.0\\). In the diagrams, each open circle represents an atom of \\(\\text{A}\\) and each filled circle represents an atom of \\(\\text{B}\\). Which of the following particulate diagrams represents a system at equilibrium under these conditions?"
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url: "https://nerd-notes.com/ubq/120323/"
date_modified: "2026-08-23T04:04:41+00:00"
---

# The gas-phase reaction between \(\text{A}_2\) and \(\text{B}_2\) to form \(\text{AB}\) is represented by the balanced equation below.

\[ \text{A}_2(g) + \text{B}_2(g) \rightleftharpoons 2\text{AB}(g) \]

A mixture of \(\text{A}_2(g)\), \(\text{B}_2(g)\), and \(\text{AB}(g)\) reaches chemical equilibrium in a rigid \(1.0\text{ L}\) container at a constant temperature where \(K_c = 4.0\). In the diagrams, each open circle represents an atom of \(\text{A}\) and each filled circle represents an atom of \(\text{B}\). Which of the following particulate diagrams represents a system at equilibrium under these conditions?

The gas-phase reaction between \(\text{A}_2\) and \(\text{B}_2\) to form \(\text{AB}\) is represented by the balanced equation below.

\[ \text{A}_2(g) + \text{B}_2(g) \rightleftharpoons 2\text{AB}(g) \]

A mixture of \(\text{A}_2(g)\), \(\text{B}_2(g)\), and \(\text{AB}(g)\) reaches chemical equilibrium in a rigid \(1.0\text{ L}\) container at a constant temperature where \(K_c = 4.0\). In the diagrams, each open circle represents an atom of \(\text{A}\) and each filled circle represents an atom of \(\text{B}\). Which of the following particulate diagrams represents a system at equilibrium under these conditions?

- **A.** Diagram A
- **B.** Diagram B
- **C.** Diagram C
- **D.** Diagram D

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120323/*