Which treatment is used when a patient is diagnosed with phenylketonuria (PKU) includes

***    *** (8 pts total – 2 pts per structure)  The structure of the amino acid histidine is shown below, with all three acidic groups shown in their HA forms.     Given the pKa information below, draw the skeletal structures of the dominant form of histidine, if it’s dissolved in a solution at each of the following pH values: pKa (carboxyl) = 1.82 pKa (double-bonded N) = 6.04 pKa (protonated amino) = 9.17   A.  pH 0.0 B.  pH 3.0 C.  pH 8.0 D.  pH 11.0

Which hydrogen in the molecule below is the most acidic?  

Find the average rate of change of the function from x1 to x2.f(x) =        from x1 = 2 to x2 = 8

Use the graph of the function f, plotted with a solid line, to sketch the graph of the given function g.g(x) = – f(x) + 1

For the given functions f and g , find the indicated composition.f(x) = , g(x) = (fg)(x)

For the given functions f and g , find the indicated composition.f(x) = , g(x) = (fg)(x)

Find the average rate of change of the function from x1 to x2.f(x) =        from x1 = 2 to x2 = 8

What is the hybridization of the chlorine atom in the following molecule?

***    ***   (15 pts total – 5 pts each)     (a)  Draw the Kekule structure and a possible condensed structure of the substance below    (b)  Draw the Lewis structure and skeletal structure of the substance (CH)8   (c)  Draw the Lewis structure and skeletal structure of the substance CH3CH2CH(CH3)CONHCH3