Chlorine Dioxide (ClO₂) Is Used as a Disinfectant in Municipal

question 25

Multiple Choice

Chlorine dioxide (ClO₂) is used as a disinfectant in municipal water-treatment plants. It decomposes in a first-order reaction with a rate constant of 14 s^-1. How long would it take for an initial concentration of 0.06 M to decrease to 0.02 M?

• A) 13 ms
• B) 78 ms
• C) 92 ms
• D) 146 ms
• E) 239 ms

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Definitions:

Amortization

Amortization is the process of gradually writing off the initial cost of an intangible asset over its useful life, reflecting its consumption or decline in value.

Intangible Assets

Non-physical assets such as patents, copyrights, and goodwill that have value to a business.

Utility

A measure of the satisfaction or benefit derived from consuming goods and services.

Allocation

The process of assigning a cost, or a group of costs, to one or more cost objectives, in reasonable proportion to the benefits provided or other equitable relationship.