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

question 85

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 0.0714 s^-1. If the initial concentration were 0.12 M, what would the concentration be after 14.0 s has elapsed?

• A) 0.033 M
• B) 0.12 M
• C) 0.060 M
• D) 0.012 M
• E) 0.044 M

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Definitions:

Tibia

The larger, stronger, and anterior of the two bones in the leg below the knee in vertebrates; it supports most of the body's weight.

Talus

A bone in the ankle that sits between the tibia and fibula bones of the lower leg and the calcaneus (heel bone), playing a crucial role in foot movement.

Calcaneus

The large bone forming the heel of the foot, which supports the weight and motion of the body.

Fibula

A long, slender bone located on the lateral side of the tibia in the lower leg.