Questions: Report the answers to the following calculations to the correct number of decimal positions. Assume that each number is precise to ±1 in the last decimal position reported. 23.40-18.2=5.2 948.75+62.45=1011.20 Answer 1: 5.2 Answer 2: 1011.20 The density of whole blood is 1.05 g/mL. A typical adult has about 5.5 L of whole blood. What is the mass in pounds of this amount of whole blood? [Answer to 1 decimal place] 12.7 lb

Report the answers to the following calculations to the correct number of decimal positions. Assume that each number is precise to ±1 in the last decimal position reported. 23.40-18.2=5.2 948.75+62.45=1011.20 Answer 1: 5.2 Answer 2: 1011.20 The density of whole blood is 1.05 g/mL. A typical adult has about 5.5 L of whole blood. What is the mass in pounds of this amount of whole blood? [Answer to 1 decimal place] 12.7 lb
Transcript text: 8-61. Report the answers to the following calculations to the correct number of decimal positions. Assume that each number is precise to $\pm 1$ in the last decimal position reported. \[ \begin{array}{l} 23.40-18.2=5.2 \\ 948.75+62.45=1011.20 \end{array} \] Answer 1: 5.2 Answer 2: 1011.20 8-67. The density of whole blood is $1.05 \mathrm{~g} / \mathrm{mL}$. A typical adult has about 5.5 L of whole blood. What is the mass in pounds of this amount of whole blood? [Answer to 1 decimal place] [red47] pounds 12.7 Ib
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Solution

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Solution Steps

Step 1: Understand the Problem

We need to convert the volume of whole blood from liters to milliliters, then use the density to find the mass in grams, and finally convert the mass from grams to pounds.

Step 2: Convert Volume from Liters to Milliliters

Given:

  • Volume of whole blood: \(5.5 \, \text{L}\)
  • Conversion factor: \(1 \, \text{L} = 1000 \, \text{mL}\)

\[ 5.5 \, \text{L} \times 1000 \, \text{mL/L} = 5500 \, \text{mL} \]

Step 3: Calculate the Mass in Grams

Given:

  • Density of whole blood: \(1.05 \, \text{g/mL}\)

\[ \text{Mass} = \text{Density} \times \text{Volume} = 1.05 \, \text{g/mL} \times 5500 \, \text{mL} = 5775 \, \text{g} \]

Step 4: Convert Mass from Grams to Pounds

Given:

  • Conversion factor: \(1 \, \text{lb} = 453.592 \, \text{g}\)

\[ \text{Mass in pounds} = \frac{5775 \, \text{g}}{453.592 \, \text{g/lb}} \approx 12.7373 \, \text{lb} \]

Step 5: Round to One Decimal Place

\[ 12.7373 \, \text{lb} \approx 12.7 \, \text{lb} \]

Final Answer

\[ \boxed{12.7 \, \text{lb}} \]

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