Chemical Reactions: ConcepTest and Example Problem

Try to answer this ConcepTest and solve the example problem before using this module. Studies show that trying to answer the questions before studying material improves learning and retention. We suggest that you write down the reasons for your answers. By the end of this module, you should be able to answer these on your own. Answers will be given at the end of this module.

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Example Problem 1

39.0 g of KO2 reacts at 25°C with CO2 that is kept in a 3.30 L sealed vessel with an original pressure of 6.40 atm. What is the final total pressure of the system after completion of the reaction? Assume the temperature remains constant and that the volume occupied by the solids is negligible.
4KO2 (s) + 2CO2 (g) → 2K2CO3 (s) + 3O2 (g)