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Quiz

CHEM XL-14A Quiz 5Exam


Department
Chemistry and Biochemistry
Course Code
CHEM 14A
Professor
All
Study Guide
Quiz

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Q: Why does hamburger have lower energy than steak?
A: Because it's in the ground state.
NAME:_____________________________
TA: Robert
Section: 1E
Quiz #5
1. Complete the reaction scheme for today’s experiment. (6pts) What is the
intermediate structure called? (2pts)
2. Why are we using the quartz cuvet and not a plastic/glass cuvet today? (2pts)
3. Why shouldn’t you inhale isopentyl nitrite? (2pts)
4. Based on your knowledge of dienes and dienophiles, rank the following reactions in
order of temperature needed to induce a reaction. (3 = lowest temp, 1 = highest
temp). (3pts) Explain your reasoning. (4pts)
5. If a student observes an absorbance of 0.754 a.u. at 450 nm, and the concentration
of the sample is 3.0 x 10-4 M, what is the molar extinction coefficient at that
wavelength? (1pt)
NH2
CO2H
O
Ph
Ph
Ph
Ph
Isopentyl nitrite
anthranilic acid
biphenylene
1,2,3,4-tetraphenylnaphthalene
-CO2
CO2H
CO2H
CO2H
CO2H
+
+
+
CO2H
CO2H
CO2H
CO2H
X oC
Y oC
Z oC
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