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Public opinion is worth examining because it helps explain the behavior of candidates, political parties, and other political actors

Two mirrors are at right angles to one another.  A light ray is incident on the first at an angle (theta) of 25o.  What is the angle of reflection (phi) from the second surface?

  A police car travels down a two-lane road at a constant speed of 100 mph, it siren emitting sound at a frequency of 600 Hz.  Ahead of the police car, Danica is traveling in the same direction at a speed of 80 mph.  What frequency does Danica hear? (Note:  1 mph = 0.447 m/s and vsound = 343 m/s)

In a synthesis of 4-methylcyclohexene by dehydration of cyclohexanol (see the equation given below), you start with 0.22 grams of the alcohol. The molecular weight of 4-methylcyclohexanol is 114.19 g/mol. How many molecules of alcohol is this? Problem viewing the image, Click Here   You will need to know that a mole of a substance is equal to Avogadro’s number (6.022 x 1023) of molecules of that substance.  Give the number of molecules to 3 significant figures, and do not use scientific notation. Include all of the zeros in your answer (we want you to see how large the number of molecules is). In addition, write down the number of zeros you included in parentheses.  For example, if one of your answers is 6.022 x 1023, then you would write it as follows:  602000000000000000000000 (21 zeros). 

Shown below is the Aldol reaction that you performed in lab. What is the role of the sodium hydroxide in this reaction?    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)  

In the Aldol synthesis shown in the equation given below, you start with 0.45 grams of the aldehyde and you isolate 0.12 grams of the Aldol product. In this reaction, 2 molecules of the aldehyde react to make one molecule of the product. To complete this question you will need to determine the molecular weights of the reactant and the product. Problem viewing the image, Click Here   Atomic Weight Information (see below) 1. What is the theoretical yield of the reaction in moles? [1] 2. What is the percent yield of the reaction? [2]

There are many selective oxidizing reagents that are often not covered in a lecture course. One of these is potassium permanganate, KMnO4. You do not need to know how potassium permanganate works in order to answer this question. Shown below is oxidation of an alcohol with potassium permanganate. There are two possible products, A and B. Using the infrared spectrum of the actual product provided below, decide whether the product is A or B.   Problem viewing the image, Click Here   IR Correlation Chart (see below)

You have a mixture of benzene, ethanol, and diphenyl ether all dissolved in diethyl ether as the solvent. You extract the mixture with water. Which (benzene, ethanol, or diphenyl ether) is most likely to be extracted into the water? Problem viewing the image, Click Here  

Shown below is the Aldol reaction that you performed in lab. The product obtained is a solid. What are the two methods you used to characterize your product?   Problem viewing the image, Click Here