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? Recall that 1 mL = 1 cm³.a. 7.0 × 10¹⁸ red blood cellsb. 7.0 × 10⁷ red blood cellsc. 7.0 × 10¹² red blood cellsd. 7.0 × 10⁹ red blood cells

Answer 1

C. 7.0 × 10¹² red blood cells

Explanation:

First, recall the standard conversion between mm³ and Liters:

`1\text{ Liter}=10^6\text{ mm}^3\text{ }`

Thus, if one cubic millimeter (mm³) of blood contains 7.0 x 10⁶ red blood cells.

`\begin{gathered} 1\text{ Liter=}7*10^6*10^6 \\ =7*10^(6+6) \\ =7*10^(12)\text{ red blood cells} \end{gathered}`

The correct choice is C.