There are very many different commercial polymers, one of these is polypropylene, which is used in many applications such as clothing. By looking at the repeating structures in polypropylene (below), choose the correct monomer that is polymerized to make this polymer.   Problem viewing the image, click here 

In the Aldol Condensation reaction shown below, Is the water a by-product or a side-product? Problem viewing the image, Click Here  

There are many selective reducing agents that are also not normally covered in a lecture course. One of these is sodium triacetoxyborohydride, NaBH(OAc)3. Shown below is a structure with both aldehyde and ketone functional groups. NaBH(OAc)3 will selectively reduce one of these two functional groups. Using the infrared spectrum provided below as evidence. What is the product of this reduction reaction, A, B, or C?   A.      B.      C.      Problem viewing the image, Click Here   IR Correlation Chart (see below)  

Shown below is an Aldol Condensation reaction. Which one of the following reactant is consistent with the following IR spectrum: A or B? A.      B.      Problem viewing the image, Click Here   IR Correlation Chart (see below)  

The pH of a solution containing 1×10−8 M HCl is 8

What is the pH of a solution containing [x]0 M H2SO4? H2SO4: Ka2 = 1.2×10−2 Enter your answer numerically to three significant figures.

What is the pH of a solution containing [x]0 M C5H5NHCl? C5H5N: Kb = 1.5×10−9    Enter your answer numerically to three significant figures.

The conjugate acid of H2PO3− is HPO32−

The next ten questions do not correspond to the reaction above. They are independent of each other.

Consider the following mechanism for the oxidation of bromide ions by hydrogen peroxide in aqueous acid solution. H+     +     H2O2        ⇌   H2O+−OH (rapid equilibrium) H2O+−OH   +   Br–    → HOBr   +   H2O (slow)                    HOBr   +   H+   +   Br–  → Br2   +   H2O (fast) Which of the following rate laws is consistent with the mechanism?