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title: "The decomposition of sulfur trioxide is represented by the following equation:  \\[ 2\\,\\text{SO}_3(g) \\rightleftharpoons 2\\,\\text{SO}_2(g) + \\text{O}_2(g) \\quad K_c = 8.0 \\times 10^{-10} \\text{ at } 600\\text{ K} \\]  A student places \\(0.40\\text{ mol}\\) of \\(\\text{SO}_3(g)\\) into an evacuated, rigid \\(2.0\\text{ L}\\) container and allows the system to reach equilibrium at \\(600\\text{ K}\\). Which of the following is closest to the equilibrium concentration of \\(\\text{SO}_2(g)\\)?"
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url: "https://nerd-notes.com/ubq/120304/"
date_modified: "2026-08-23T04:04:27+00:00"
---

# The decomposition of sulfur trioxide is represented by the following equation:

\[ 2\,\text{SO}_3(g) \rightleftharpoons 2\,\text{SO}_2(g) + \text{O}_2(g) \quad K_c = 8.0 \times 10^{-10} \text{ at } 600\text{ K} \]

A student places \(0.40\text{ mol}\) of \(\text{SO}_3(g)\) into an evacuated, rigid \(2.0\text{ L}\) container and allows the system to reach equilibrium at \(600\text{ K}\). Which of the following is closest to the equilibrium concentration of \(\text{SO}_2(g)\)?

The decomposition of sulfur trioxide is represented by the following equation:

\[ 2\,\text{SO}_3(g) \rightleftharpoons 2\,\text{SO}_2(g) + \text{O}_2(g) \quad K_c = 8.0 \times 10^{-10} \text{ at } 600\text{ K} \]

A student places \(0.40\text{ mol}\) of \(\text{SO}_3(g)\) into an evacuated, rigid \(2.0\text{ L}\) container and allows the system to reach equilibrium at \(600\text{ K}\). Which of the following is closest to the equilibrium concentration of \(\text{SO}_2(g)\)?

- **A.** \(2.0 \times 10^{-4}\text{ M}\)
- **B.** \(4.0 \times 10^{-4}\text{ M}\)
- **C.** \(8.0 \times 10^{-4}\text{ M}\)
- **D.** \(4.0 \times 10^{-3}\text{ M}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120304/*