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The average density of human blood is 1.06g/mL. What is the mass of blood (in kg) in an adult with a blood volume of 5.5 L?

The average density of human blood is 1.06g/mL. What is the mass of blood (in kg) in-example-1

1 Answer

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First, let's convert 5.5 L to milliliters to cancel correctly when we use the formula. Remember that 1 liter equals 1000 mL:


\text{5}.5\text{ L}\cdot\frac{1000\text{ mL}}{1\text{ L}}=5500\text{ mL.}

Now that we have this value, we can find the mass using the formula:


\begin{gathered} \text{density}=(mass)/(volume), \\ \text{mass}=\text{density}\cdot\text{volume.} \end{gathered}

And replace the data that we have:


\begin{gathered} \text{mass}=1.06(g)/(mL)\cdot5500mL, \\ \text{mass}=5830\text{ g.} \end{gathered}

But we need to give the answer in kg, so remember that 1 kg equals 1000 g. The conversion from 5830 g to kg would be:


5830\text{ g}\cdot\frac{1kg}{1000\text{ g}}=5.83kg.

The answer is that the mass of blood is 5.83 kg in 5.5 L.

User Oleg Khalidov
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