Read the description of dipole-dipole forces on page 9 of your lab manual. polar molecules experience permanent partial positive and partial negative charges. use arrows (like the ones shown on page 9 of your manual) to show the direction of the net dipoles in the following molecules. if there is no net dipole, circle the molecule (18 pts). hint: when drawing your arrows, think about electronegativity of each atom. the arrow will point towards the location of the electron density. the first one is done for you.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.