Hydrogen Peroxide (H₂O₂) Decomposes Catalytically in the Presence of Metal

question 20

Multiple Choice

Hydrogen peroxide (H₂O₂) decomposes catalytically in the presence of metal ions and enzymes called peroxidases. You may have noticed this reaction occurring if you use a drugstore solution of hydrogen peroxide as a mouthwash or antiseptic. If a 250 mL bottle of hydrogen peroxide solution containing 3.0% H₂O₂ (by mass) completely decomposes, how many liters of oxygen gas would it generate? Assume that 1 mol of gas occupies a volume of 22.4 L and that the density of the solution is 1.0 g/mL. The reaction is 2H₂O₂(aq)  2H₂O( ) + O₂(g)

• A) 2.5 L
• B) 4.9 L
• C) 9.9 L
• D) 7.4 L
• E) 0.22 L

---

Definitions:

Purpose

The reason for which something is done or created, or the reason for an object's existence.

Goal Setting

The practice of identifying and outlining personal or professional targets and planning steps to achieve them.

Determine Purpose

The process of identifying the specific reason or intention behind an action or task.

Attend College

The action of enrolling in and going to a tertiary education institution for pursuing higher education or a degree.