Answer:
Step-by-step explanation:
The hemoglobin concentration is given in grams per deciliter (g/dL), and we want to find the mass of hemoglobin in milligrams (mg) per milliliter (mL) of blood.
To convert g/dL to mg/mL, we can use the following conversion factors:
1 g = 1000 mg (since "milli" means one-thousandth)
1 dL = 100 mL (since "deci" means one-tenth)
Therefore, 1 g/dL = (1000 mg/1 g) / (100 mL/1 dL) = 10 mg/mL.
So, to find the mass of hemoglobin in 4.50 mL of the patient's blood, we can multiply the hemoglobin concentration by the volume of blood:
mass of hemoglobin = (15.5 g/dL) x (10 mg/mL) x (4.50 mL) = 697.5 mg
Therefore, there are 697.5 milligrams of hemoglobin in every 4.50 mL of the patient's blood.