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Chapter 1: Problem 39

An average adult has \(6.0 \mathrm{~L}\) of blood. The Red Cross usually takes 1 pint of blood from each donor at a donation. What percentage (by volume) of a person's blood does a blood donor give in one donation?

Short Answer

Expert verified
Answer: A person donates approximately 7.9% of their total blood volume when they give 1 pint of blood.

Step by step solution

01

Convert the donated blood volume to liters

To convert the donated blood volume from pints to liters, we can use the conversion factor 1 pint = 0.473176 L. So, we have: 1 pint * 0.473176 L/pint = 0.473176 L
02

Calculate the percentage of donated blood volume

Now, we will calculate the percentage of the total blood volume in the body that's been donated. We can do this by dividing the donated blood volume (in liters) by the total blood volume in the human body and multiply by 100 to get the percentage: Percentage = (Donated Blood Volume / Total Blood Volume) * 100 Percentage = (0.473176 L / 6.0 L) * 100
03

Simplify the percentage

Now, we'll simplify the percentage calculation by completing the division and multiplication: Percentage ≈ (0.07886333) * 100 Percentage ≈ 7.886333 %
04

Round the percentage to a reasonable value

Finally, we'll round the percentage to a more reasonable number. Percentage ≈ 7.9 % So, a blood donor gives approximately 7.9% of their total blood volume in one donation.

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Most popular questions from this chapter

Potassium sulfate has a solubility of \(15 \mathrm{~g} / 100 \mathrm{~g}\) water at \(40^{\circ} \mathrm{C}\). A solution is prepared by adding \(39.0 \mathrm{~g}\) of potassium sulfate to \(225 \mathrm{~g}\) of water, carefully heating the solution, and cooling it to \(40^{\circ} \mathrm{C}\). A homogeneous solution is obtained. Is this solution saturated, unsaturated, or supersaturated? The beaker is shaken, and precipitation occurs. How many grams of potassium sulfate would you expect to crystallize out?

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