---
title: "Nitrogen monoxide gas, \\(\\text{NO}(g)\\), reacts with oxygen gas, \\(\\text{O}_2(g)\\), to form nitrogen dioxide gas, \\(\\text{NO}_2(g)\\), according to the balanced equation:  \\[ 2\\text{NO}(g) + \\text{O}_2(g) \\rightarrow 2\\text{NO}_2(g) \\]  The particulate diagram shows a mixture of \\(\\text{NO}(g)\\) and \\(\\text{O}_2(g)\\) in a rigid container before any reaction takes place. Assuming the reaction proceeds to completion, which of the following particulate representations best represents the contents of the container after the reaction is complete?"
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url: "https://nerd-notes.com/ubq/119911/"
date_modified: "2026-08-21T08:17:19+00:00"
---

# Nitrogen monoxide gas, \(\text{NO}(g)\), reacts with oxygen gas, \(\text{O}_2(g)\), to form nitrogen dioxide gas, \(\text{NO}_2(g)\), according to the balanced equation:

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

The particulate diagram shows a mixture of \(\text{NO}(g)\) and \(\text{O}_2(g)\) in a rigid container before any reaction takes place. Assuming the reaction proceeds to completion, which of the following particulate representations best represents the contents of the container after the reaction is complete?

Nitrogen monoxide gas, \(\text{NO}(g)\), reacts with oxygen gas, \(\text{O}_2(g)\), to form nitrogen dioxide gas, \(\text{NO}_2(g)\), according to the balanced equation:

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

The particulate diagram shows a mixture of \(\text{NO}(g)\) and \(\text{O}_2(g)\) in a rigid container before any reaction takes place. Assuming the reaction proceeds to completion, which of the following particulate representations best represents the contents of the container after the reaction is complete?

![A square container representing a rigid reaction vessel. At the top of the box, a legend specifies: a shaded circle represents a nitrogen atom (\(\text{N}\)), and an open white circle represents an oxygen atom (\(\text{O}\)). Inside the container, there are exactly 6 \(\text{NO}\) molecules and exactly 4 \(\text{O}_2\) molecules distributed evenly. Each \(\text{NO}\) molecule consists of exactly one shaded circle touching one open white circle. Each \(\text{O}_2\) molecule consists of exactly two open white circles touching each other. No other particles, labels, text, or annotations appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1787300238-eF1we6.jpg)

- **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/119911/*