Question

A normal value for blood cholesterol is 200 mg/dL of blood. if a normal adult has a total blood volume of 5L , how much total cholesterol is present

Answer 1

A normal adult has 10 grams of cholesterol in 5 liters of blood.

Step-by-step explanation:

A normal value for blood cholesterol is 200 mg per 1 dL of blood. The milligram is a unit of mass, being one thousandth of the gram, while the deciliter (dL) is a unit of volume equivalent to one tenth of a liter. Therefore, a normal value for blood cholesterol is of 0,2 grams per 0,1 liters of blood. If a normal adult has a total blood volume of 5 liters, and a liter of blood has 2 grams of cholesterol (0,2 x 10), a normal adult has 10 grams of cholesterol in 5 liters of blood.

Answer 2

Convert the given density in mg/dL into a quantity with unit of g/L. This is shown below,
(200 mg / dL) x (10 dL / L) x (1 g / 1000 mg) = 2 g/L
Multiplying this quantity with the volume given, 5L, gives an answer of 10g.