(WCSU24) From the dropdowns, identify whether the compound contains ionic bonds, covalent bonds, or both. a)  SiO2  [drop1] b) cobalt(II) bromide   [drop2] c)  sulfur hexafluoride  [drop3] d) CaCO3 [drop4]    Periodic Table

(WCSU24) The cross sections of three different ionic compounds (labeled Compound 1, 2 and 3) are displayed in the figures below. In the figures, the charge on each ion is indicated, and the diameter of each circle reflects the diameter of each ion.    Rank these compounds in order of increasing melting point. lowest [drop1] < [drop2] < [drop3] highest

(WCSU24) Select all functional groups present in the structure of the drug.  

17.  (WCSU24.[x], 8 points) Zinc gluconate (C12H22O14Zn, MW = 455.685 g/mol) is the active ingredient in Cold-Eeze lozenges.  The label claims that zinc supplements can shorten the common cold by 42%.    a. What is the mass percent of zinc in zinc gluconate? b. There are 94 mg of zinc gluconate in a Cold-Eeze lozenge, how much zinc is consumed?   Periodic Table   In the box below, enter the mass of zinc consumed from part b.

Is ionization energy always a positive or negative value?  Explain why in just a few words. (WCSU24)

(WCSU24) Below is the structure of glutathione, 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

13. (WCSU24.[x], 5 points)  Draw the structure shown below and add curved arrows to show the movement of electrons to give a resonance contributor. Draw this resonance contributor. Be sure to include lone pairs and formal charges on your structure as needed.   In the box below, enter the number of C-N bonds in your resonance structure.

(WCSU24) Shown below is the structure of a neurotransmitter that plays a role in the fight or flight response. Complete the table below. Question Answer How many sigma bonds are present? [blank1] How many pi bonds are present? [blank2] How many lone pairs are in the structure? [blank3] What orbitals overlap to form the bond indicated by a? (select n/a if only one set) [blank4], [blank5] What orbitals overlap to form the bond indicated by b? (select n/a if only one set) [blank6], [blank7]   Periodic Table

Which of the following statements about the Battle of Gettysburg is true?

What was the status at birth of most African American soldiers who served the Union army?