(WCSP25) Below is the structure of a powerful antioxidant produced in the liver that plays a role in removing free radicals that can cause cell damage.  Identify the formal charges on the atoms A-D.  All the lone pairs are drawn in for you.  Labeled Atom Formal Charge A [blank1] B [blank2] C [blank3] D [blank4] , Periodic Table  

TASK The task is to describe your life as a student and to accomplish that, you are provided with the following guidelines: This is a paragraph not a list of questions. introduce yourself share where you study-name of the school  classes you take (at least 2: if you take one class, you need to make up the second class) number of students in each one of your classes (this information can be made up) professors’ names for each class your schedule (using days of the week and times): Class times share one activity you do when you are not at school [One -ar verb] End with a farewell 

Which of the following guidelines should be followed when choosing books for young children?

18.  (WCSP25.[x], 8 points) Answer the questions about the structure below. a. Give the molecular formula b. Calculate is the molecular weight. c. Calculate the mass percent nitrogen. d. A can of soda contains 34 mg of this compound, calculate the mass of nitrogen consumed. Periodic Table   In the box below, enter the mass percent of nitrogen.

(WCSP25) Label the following molecules as polar or nonpolar. a. [drop3] b. [drop1] c.  [drop2]

(WCSP25) Consider the following bonds: C-C C-O Si-O a.  The longest bond is [blank1]. b. Rank the bonds in order of increasing polarity. least polar   [blank2]

(WCSP25) Refer to the structure below to answer the following about angles a and b and atoms c and d. a. The bond angle about angle a is: [blank1] degrees b.  The bond angle about angle b is: [blank2] degrees c.  The electron domain geometry of atom c is: [blank4] d.  The molecular geometry of atom c is: [blank5] e.  The hybridization of atom d is: [blank3]

(WCSP25) We often use theory (valence bond, hybridization, resonance, etc.) to explain experimental data. The molecule below is experimentally determined to have bond angles of exactly 120 degrees.    Based on this information, answer the following questions: a. What is the molecular geometry about the central carbon atom? [blank1] b. What is the hybridization of the central carbon atom? [blank2] c. What type of orbital holds the unpaired electron? [blank3]

16.  (WCSP25.[x], 8 points) The molecule shown to the below is used as a fluorinating agent in the preparation of fluorine-containing organic compounds: a. Give the electron domain geometry. b.  Give the molecular geometry. c.  Draw the 3D structure using wedge and dash notation to depict the geometry. d.  Draw in the direction of the molecular dipole with a dipole arrow.   In the box below, enter the total number of bonds that are drawn with a dash or wedge.

(WCSP25) Rank the molecules (a, b, and c) in order of increasing carbon-nitrogen bond strength.    weakest   [blank1]