If 18.5 grams of iron (111) sulfate are actually made when I do this reaction, what is my percent yield?

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

The correct answer is "hydrogen".

True or false:   the purpose of a defense mechanism is to get uncomfortable feelings out into the open so they can be dealt with in a healthy manner.indeed true: )