There is a stock solution of copper (II) sulfate that is 3.5 M. For the experiment you want to perform, you need 650 mL of 0.67 M solution. Describe (with calculations) how you would prepare the solution you need.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

so what is the problem with your lab report and whats the subject of the lab report? i will you