After teaching a client about taking daily oral iron preparations for a moderate iron deficiency anemia, which statement by the client indicates to the nurse that additional instruction is needed?

I will call the doctor if my stools turn black

Explanation

Iron supplements are given to patients who have iron deficiency related diseases such as anemia. There are a number of iron preparations that can be given to patients to manage these conditions. These supplements causes the stool to turn black or even green

For example the said client was given oral iron preparations for moderate iron deficiency anemia. When he says he will call a doctor if his stool turns black indicates he will need additional instructions.  

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.