Four drops of a 0.30 m imidazole solution were added to a solution in a cuvette containing ferrihemoglobin. the mass of the ferrihemoglobin solution in the cuvette was measured to be 2.540 g initially and 2.622 g after the addition of the stock imidazole solution. what is the molar concentration of imidazole in the final solution after the 4 drops of stock imidazole were added to the ferrihemoglobin solution in the cuvette? provide correct units and significant figures.

"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."

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.