On Greg's last visit to his doctor, he complained of feeling tired. His doctor orders a blood test for iron. Sandra, the registered nurse, does a venipuncture and withdraws 8.0 ml of blood. About 70% of the iron in the body is used to form hemoglobin, which is a protein in the red blood cells that carries oxygen to the cells of the body. About 30% is stored in ferritin, bone marrow, and the liver.
When the iron level is low, a person may have fatigue and decreased immunity.
The normal range for serum iron in men is 80 to 160 mcg dL. Greg's iron test showed a blood serum iron level of 42 mcg/ dL, which indicates that Greg has iron deficiency anemia. His doctor orders an iron supplement to be taken twice daily (b.i.d.).
One tablet of the iron supplement contains 35 mg of iron.
Each tablet contain 35 mg of iron, which is given for iron supplementation.
How many grams of iron will Greg consume in 1 week
Express the mass in milligrams to two significant figures
To find out how many grams of iron Greg will consume in one week, we first need to calculate the total amount of iron he will consume per day and then multiply it by 7 (number of days in a week).
Each tablet contains 35 mg of iron, and he is taking two tablets per day, so the daily intake of iron is 35 mg x 2 = 70 mg.
To convert mg to g, we divide by 1000 (since there are 1000 mg in 1 g), so the daily intake of iron is 70 mg / 1000 = 0.07 g.
Therefore, the weekly intake of iron would be 0.07 g x 7 = 0.49 g.
Therefore, Greg will consume 0.49 grams of iron in one week.
To determine the amount of iron Greg will consume in 1 week, we need to calculate the total iron intake from the iron supplement taken twice daily.
First, let's calculate the amount of iron consumed in one day:
(35 mg of iron per tablet) x (2 tablets per day) = 70 mg of iron per day.
Next, we can calculate the total iron intake in one week:
(70 mg of iron per day) x (7 days in a week) = 490 mg of iron per week.
Finally, to express this mass in milligrams to two significant figures, we round the result:
490 mg ≈ 490 mg.
Therefore, Greg will consume approximately 490 mg of iron in 1 week.
To calculate how many grams of iron Greg will consume in one week, we need to determine the amount of iron in one tablet and then multiply it by the number of tablets consumed per week.
Given that each tablet contains 35 mg of iron, we can start by converting milligrams to grams by dividing by 1000:
35 mg ÷ 1000 = 0.035 g
Next, we need to determine how many tablets Greg will consume in one week. Since he is prescribed to take the iron supplement twice daily (b.i.d.), he will take:
2 tablets/day × 7 days/week = 14 tablets/week
Now, we can calculate the total amount of iron Greg will consume in one week by multiplying the amount of iron in one tablet (0.035 g) by the number of tablets consumed:
0.035 g × 14 tablets = 0.49 g
Therefore, Greg will consume approximately 0.49 grams of iron in one week.
Expressing the mass in milligrams to two significant figures, the answer is:
0.49 g × 1000 = 490 mg.