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

1 answer

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.