Unformatted text preview: ergy.
Q2. B (5 points)
The “spin state” of a group of protons in the same molecule can be described by specifying whether each spin
is in the lower energy level, state A, or in the upper energy level, state B. The spins behave independently of
one another (the spin state of one does not depend on the spin states of the others). For a group of six protons
how many distinct states are there? For example, the two spin states ABBABB and AABBBB are two distinct
states, although they have the same energy. Q2. B (5 points)
Q2. C (5 state” of
The “spin points) a group of protons in the same molecule can be described by specifying whether each spin
If we take the probability of a proton being in state energy level, state B. each to be exactly 1/2 (i.e. like a coin
is in the lower energy level, state A, or in the upper A and being in state BThe spins behave independently of
ﬂip) so that (the spin state of one does not depend on the spin states of the others). a group of four protons
one another all possible spin states are equally populated, predict the probability that For a group of six protons
has two spins in state A are two in For example, the two spin states ABBABB and AABBBB are two distinct
how many distinct states and there? state B.
states, although they have the same energy.
Q2. C (5 points)
If we take the probability of a proton being in state A and being in state B each to be exactly 1/2 (i.e. like a coin
ﬂip) so that all possible spin states are equally populated, predict the probability that a group of four protons
has two spins in state A and two in state B. Q2. C (5 points)
If we take the probability of a proton being in state A and being in state B each to be exactly 1/2 (i.e. like a coin
ﬂip) so that all possible spin states are equally populated, predict the probability that a group of four protons
has two spins in state A and two in state B. Final Exam MCB C100A / Chem C130 Fall 2012
Question 2 (15 points)
Question
Proton NMR spectroscopy exploits the interaction of the magnetic moments of protons with an applied
magnetic ...
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 Fall '09
 Kuryian
 Proton

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