Hydrogen Peroxide May Decompose to Form Water and Oxygen Gas

question 30

Multiple Choice

Hydrogen peroxide may decompose to form water and oxygen gas according to the following reaction. 2H₂O₂(g) 2H₂O(g) + O₂(g)
In a particular experiment,1.75 moles of H₂O₂ were placed in a 2.5-L reaction chamber at
307ºC.After equilibrium was reached,1.20 moles of H₂O₂ remained.What is K_c for the reaction?

• A)2.0 × 10^-4
• B)2.3 × 10^-2
• C)2.4 × 10^-3
• D)5.5 × 10^-3
• E)3.9 × 10^-4

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