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:

Cash Inflows

The total amount of money being transferred into an entity, coming from various sources like sales, financing, or investments.

Financially Attractive

A term used to describe investments or opportunities that are likely to provide a good financial return.

Internal Rate

Often refers to the internal rate of return (IRR), which is a discount rate that makes the net present value of all cash flows from a particular project equal to zero.

Return

The amount of profit or loss gained from an investment relative to its initial cost.