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AAMC FL 3 FULL REVIEW - Chem/Phys exam with 100% correct answers 2025 $15.99
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AAMC FL 3 FULL REVIEW - Chem/Phys exam with 100% correct answers 2025

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  • AAMC FL 3 Chem/Phys
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  • AAMC FL 3 Chem/Phys

Which of the carbons in Compound 3 corresponds to the carbon marked with an asterisk in Compound 4a? A.C1 B.C2 C.C3 D.C4 correct answersCorrect answer is B. Aldol condensation happens at the alpha-hydrogen, which is the hydrogen located on the alpha carbon (carbon next to the carbonyl car...

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  • January 22, 2025
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  • AAMC FL 3 Chem/Phys
  • AAMC FL 3 Chem/Phys
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AAMC FL 3 FULL REVIEW - Chem/Phys

Which of the carbons in Compound 3 corresponds to the carbon
marked with
asterisk an
in Compound
4a?
A.C1
B.C
2
C.C
3
D.C4 correct answersCorrect answer
is B.
Aldol condensation happens at the alpha-hydrogen, which is the hydrogen
located
the alphaoncarbon (carbon next to the carbonyl
carbon).
Aldol condensation correct answersAldehyde +
Aldehyde
Ketone +
Ketone
Aldehyde +
Ketone
Catalyzed by an acid or base (base used
here).
1) Deprotonation: base deprotonates α-H, leaving the
enolate
2) ion.
Nucleophilic attack: enolate ion as the nucleophile attacks the
carbonyl
form carbon to
an alkoxide
ion.
3) Protonation: alkoxide ion is a stronger base than a hydroxide ion (b/c
EDG alkylto O) and deprotonates water to complete
attached
theCondensation:
4) aldol. strong base (OH-) does E2 dehydration rxn by
deprotonation of the α-
C to make the enal (subsequent double bond and original
carbonyl).
-> Aldol is unstable and is easily dehydrated by heat or a base to an
enal whichby
stabilized is conjugated double
bonds.
What can be inferred from the results of Scheme A about the relative
thermodynamic
stabilities of Compounds 4a and
4b?
A.They are equally
B.Compound 4a is less stable than
stable.
Compound 4b.
C.Compound 4a is more stable than
Compoundcan
D.Nothing 4b. be inferred about relative thermodynamic
stabilities. correct
answersCorrect answer
is C. two major factors for what products are preferentially formed are:
The
thermodynamic
and kinetic. thermodynamic control will favor the more energetically
stableifproducts,
even they require a higher activation energy and more time to produce.
Kinetic
will control
favor products that form more quickly; these products are usually less
energetically
stable but are formed faster due to lower activation
energies.

,The question stem tells us to look for the thermodynamic influence on
scheme
4a is moreA. stable because it is the product that is produced more
(60% > 40%)
Which of the following compounds is most likely to be a major product in
Step 2
aldol if the
condensation is NOT followed by a dehydration reaction? correct
answer is
answersCorrect
A.
The dehydration reaction would involve protonating the OH and making
another double
bond
.
What is the total amount of charge and energy, respectively, that the
capacitor
if will store
it is connected to the battery on the
railcar?
A.0.12 C and
14.4 J C and
B.1.20
7.20 J C and
C.1.44
0.12
D.7.20 J C and 1.20 J correct answersCorrect
answer is D.
c=
q/v
c x v=
q
It gives us the capacitance in mF, NOT F so make sure to convert. (1
milifarad = 0.001
farad
).
100mF x 0.001F/1mF =
0.1
It tells us the battery volts are
12V.
(0.1)(12) =
1200e-3
=1.2
J
The work done to charge the capacitor is U = 1/2
C x V^2
1/2 (100e-3)(12)2=
7.20 J
Capacitance equation: correct answersC
= Q/V
Capacitance = Charge /
Voltage
Capacitance -
farads; f-
Charge
coulombs;
Voltage - c
volts; v
Energy of a capacitor equation: correct answersU = 1/2QV =
1/2CV^2
C=
capacitance

, Suppose that the railcar passes by a horn that is emitting a sound with
frequency
Which f. following describes the frequency f' that the person on the
of the
railcar hears?
A. f prime > f before passing the horn, f prime < f after
passing it
B. f prime < f before passing the horn, f prime > f after
passing it
C. f PS-10-1-prime.gif = f before passing the horn, f PS-10-1-prime.gif = f
after passing it

D. f PS-10-1-prime.gif > f before passing the horn, f PS-10-1-prime.gif > f
after
it passing
correct answersCorrect answer
fisprime
A. > f before passing the actual horn; f prime < f after
passing it
This is the Doppler Effect. As you get closer to the horn/ambulance, the
frequency
hear (f') is you
higher than the actual frequency, and once you're moving
way from the
horn/ambulance, the frequency you hear is lower than the true
frequency.
Doppler effect correct answersDoppler's effect explains the perceived
increase (or
decrease) in the frequency of sound, light, or other waves as the source
and observer
move toward (or away from) each
other.
If no braking occurs, a total of how much power would be required to keep
the railcar
moving at 40
m/s?
A.16
kW
B.40
kW
C.600
kW
D.800 kW correct answersCorrect
answer is B.
Power = force (N) x velocity
(m/s)
power= 1000N x 40 m/s = 40,000W =
40kW
1 kW = 1,000
W
Equation for power correct answersP
= W/t in J/ time in
(work
S)
P=fX
v
(force in N and velocity in
m/s)
If the generator-brake system alone were engaged when the railcar was
moving,
of which graphs would most accurately represent the subsequent
the following
speed ofcorrect
railcar? the answersCorrect answer
is D.

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