---
title: "A student calibrates an air-quality sensor using a sealed chamber containing an equilibrium mixture represented by the following equation.  \\(\\text{N}_2\\text{O}_4\\text{(g)} \\rightleftharpoons 2\\text{NO}_2\\text{(g)}\\)  For each gas in the mixture, the ideal gas law gives \\(P_i=[i]RT\\), where \\(P_i\\) is the partial pressure and \\([i]\\) is the molar concentration. At a fixed temperature \\(T\\), which relationship between \\(K_p\\) and \\(K_c\\) applies to the reaction?"
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url: "https://nerd-notes.com/ubq/119315/"
date_modified: "2026-08-19T12:39:46+00:00"
---

# A student calibrates an air-quality sensor using a sealed chamber containing an equilibrium mixture represented by the following equation.

\(\text{N}_2\text{O}_4\text{(g)} \rightleftharpoons 2\text{NO}_2\text{(g)}\)

For each gas in the mixture, the ideal gas law gives \(P_i=[i]RT\), where \(P_i\) is the partial pressure and \([i]\) is the molar concentration. At a fixed temperature \(T\), which relationship between \(K_p\) and \(K_c\) applies to the reaction?

A student calibrates an air-quality sensor using a sealed chamber containing an equilibrium mixture represented by the following equation.

\(\text{N}_2\text{O}_4\text{(g)} \rightleftharpoons 2\text{NO}_2\text{(g)}\)

For each gas in the mixture, the ideal gas law gives \(P_i=[i]RT\), where \(P_i\) is the partial pressure and \([i]\) is the molar concentration. At a fixed temperature \(T\), which relationship between \(K_p\) and \(K_c\) applies to the reaction?

- **A.** \(K_p=\dfrac{K_c}{RT}\)
- **B.** \(K_p=K_cRT\)
- **C.** \(K_p=K_c(RT)^2\)
- **D.** \(K_p=K_c\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119315/*