Level 1 – Mass Spectroscopy – Isotopic Ratios A student is examining a mass spectrum and has observed an m/z peak at 222 and 224 in a ratio of 3:1. What functional group is most likely present?

Level 3 – Sterochemistry of SN1/E1 Reactions After reacting n-butyl alcohol with HCl, the expected major product is expected to be ___________.

Level 3 – Response/Correction Factors and Gas Chromatograpy Data A student performs a gas chromatography experiment similar to the one used in lab. They are attempting to determine the appropriate correction factor for Unknown 2. What is the corrected area for Unknown 1 if Compound A’s correction factor is set to 1.00? Assume that Standards A–D are reference standards (white background), and Unknowns 1–3 represent components of an unknown sample (grey background). Given: Compound Standard A Standard B Standard C Standard D Unknown 1 Unknown 2 Unknown 3 Elution time (s) 75    100 120  160 102 123 163 Area (mV*s) 880 1110 1180 1360 1340 990 1080 Correction Factor A (1) B C D E F G  

Level 2 – SN1, E1, SN2, E2  We’ve covered the essentials for SN1, SN2, and E1 reactions and determining how a set of reaction conditions will proceed involves ranking 3 factors: 1) The nucleophile/base2) The leaving group3) The solvent Focusing on these 3 factors, and recalling what we’ve discussed in the slides, which of the following is true?

Level 1 – Solubility Interpolation: Compound X Given that compound X has a solubility of 14 g/ml at 0°C and 35 g/ml at 200°C, what would be a reasonable estimate for the expected solubility at 50°C? Assume: There is a linear relationship between the datapoints given.

Level 1 – Vapor Pressure and Composition Calculation A student is investigating the effects of Raoult’s Law by preparing a liquid solution of compounds A and B. At 60 °C, the total solution boils. At this temperature, the student measures the following partial vapor pressures: Partial pressure of compound A: 400 torr Partial pressure of compound B: 360 torr Determine the percent composition (by mole fraction) of compounds A and B in the liquid solution. (Enter the relative percentages of A and B. Answer choice order may not match compound order above.)

Level 2 – Melting Point Analysis – Interpreting Results A student is in a chemistry lab and is conducting an experiment with the aid of a list of compounds to choose from, similar to what we did in our lab. A student is given a compound and must confirm its identity. They suspect it is benzoin based on its appearance, but must confirm it first. They go to the literature and note the expected melting point; then they begin to conduct a melting point experiment. The instruments and thermometer/sensor are calibrated correctly. They write in their notebook the following: “MP range average is higher than expected (+2oC compared to the ‘suspected compound’ literature value)” -and-“narrow range (1.1oC from start to finish)”  What do the results of this melting point experiment most likely indicate?

Level 2 Infrared Spectroscopy – Reading the Spectrum Given: A: B: C:D:    Which of the spectra above would best correspond to a simple alkane (no functionality)? (there is only 1 correct answer)

Which of the following is NOT a primary cavity of the vocal tract?  

Fill in the blanks with the best answer from the dropdown menu. Use each item from the dropdown menu only once.     In the immune system, the complement cascade tags for by . In the brain, the complement system may tag for by .