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The second question is the one I'm having trouble with.
How did the absorbance change between the solution labeled atmosphere and the solution labeled lungs? If the red dye is repre
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Answer #1

Absorbance is greater for atmosphere than for lungs.

Absorbance gives oxygen concentration

Concentration of oxygen is greater for atmosphere than for lungs. This is because, during breathing, some oxygen dissolves in blood present in blood vessels of lungs

Note:

Absorbance gives concentration of red dye. But red dye represents oxygen. Hence, absorbance gives oxygen concentration

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