The Reaction That Occurs in a Breathalyzer, a Device Used

question 54

Multiple Choice

The reaction that occurs in a Breathalyzer, a device used to determine the alcohol level in a person's bloodstream, is given below. If the rate of appearance of Cr₂(SO₄) ₃ is 1.64 mol min^-1 at a particular moment, what is the rate of disappearance of C₂H₆O at that moment? 2K₂Cr₂O₇ + 8H₂SO₄ + 3C₂H₆O → 2Cr₂(SO₄) ₃ + 2K₂SO₄ + 11H₂O

• A) 0. 547 mol min^-1
• B) 1.09 mol min^-1
• C) 2.46 mol min^-1
• D) 4.92 mol min^-1

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Definitions:

Light

Electromagnetic radiation within a certain portion of the electromagnetic spectrum, visible to the human eye and responsible for the sense of sight.

Vision

The ability to see, resulting from the processes of light being detected by the eyes and interpreted by the brain.

Colour

The property of objects as perceived by the human eye and brain due to the way an object reflects or emits light.

Pupil

The opening in the center of the iris of the eye that regulates the amount of light that enters the eye, adjusting in size based on light conditions.