If We Know the Amount of Light That Is Absorbed

question 74

Multiple Choice

If we know the amount of light that is absorbed in a solution, we can calculate the concentration of the substance dissolved in water using a spectrophotometer. For a certain substance the concentration (in moles/liter) is given by the formula , where is the intensity of the incident light and is the intensity of light that emerges. What is the concentration of the substance if the intensity is 45% of ?

• A) 952 mol/L
• B) -3,667 mol/L
• C) 2,928 mol/L
• D) 2,192 mol/L
• E) 1,272 mol/L

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Definitions:

Pharynx

The muscular tube that connects the mouth and nasal passages with the esophagus and larynx, involved in breathing, swallowing, and speaking.

Inspiratory Reserve Volume

The additional amount of air that can be forcibly inhaled after the completion of a normal inspiration.

Inspiratory Capacity

The maximum amount of air an individual can inhale after completing a normal, restful exhalation, important in respiratory assessments.

Tidal Volume

The amount of air moved into or out of the lungs during a normal breath.