Question

One cubic millimeter (mm3) of blood contains 7.0 x 106 red blood cells. How many red blood cells are in 1.0 L of blood?

Answer 1

the question gives us a conversion factor---> 1 mm3= 7.0 x 10^6 RBC. so, to find how many red blood cells we have, we first need to convert the Liters to cm3 using this conversion factor--> 1 mL= 1 cm3

i have attached how to solve this problem.

Answer 2

There are $7.0\times 10^{12}$ red blood cells are in 1.0 L of blood.

Given:

One cubic millimeter of blood contains $7.0\times 10^{6}$ red blood cells.

To find:

The number of red blood cells in 1.0 Liters of blood.

Solution:

Number of blood cells in 1 cubic millimeter = $7.0\times 10^{6}\text{ red blood cells}$

The volume of blood given = 1.0 L

$1 liter = 10^6 mm^3\\1.0L=1.0\times 10^6 mm^3=1.0\times 10^6 mm^3$

The number of red blood cells in $1.0\times10^6 mm^3$ of blood:

$=7.0\times 10^{6}\times 1.0\times 10^6\text{ red blood cells}\\=7.0\times 10^{12}\text{ red blood cells}$

There are $7.0\times 10^{12}$ red blood cells are in 1.0 L of blood.

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