The following data were obtained with Polymethylmethacrylate in toluene at 25C. Calculate the molecular weight of the polymer. c (g/100 ml) hrel 0.275 1.170 0.344 1.215 0.896 1.629 1.199 1.892 1.604 2.330 2.108 2.995

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.