Question

a normal hemoglobin concentration in the blood is 15g/100ml of blood how many kilogram of hemoglobin are in a person who has 5.5 l of blood

Answer 1

Using stoichiometry:

5.5 L of blood x (1000 mL/1L) x (15 g/100 mL) x (1 kg/1000 g) = 0.825 kg

Answer 2

Answer:

there are 0.825 kg in 5.5 l of blood

Explanation:

First, we have to convert L into mL so we work with the same units

$(5.5L)(\frac{1000mL}{1L}) =5500 mL$

Using a rule of three we have:

15 g of hemoglobin ------> 100 mL of blood

               x               ------> 5500 mL of blood

$x=\frac{(15 g)(5500mL)}{100mL} =825g$

As the answer must be in kilogram we must convert grams into kilograms:

$(825g)(\frac{1kg}{1000g} )=0.825kg$