Chem 111
Ch
R i
Review
UMass- Amherst
6 6 6 Biochemistry
6 6 2 ...Teaching
Initiative
Announcement
Review Schedule - ISB 135
Weds 4-6 PM C. Joseph
W d 7-9
Weds
7 9 PM JJ. T
Tyson and
dM
M. JJohnson
h
Thurs 4-6 PM B.Botch
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General Tips
Relax
Practice:
P
ti
http://people.chem.umass.edu/cjoseph/chem111/
http://courses.umass.edu/chem111-bbotch/
Do problems you know and not frustrate you.
Eliminate answers
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Tentative - Tyson
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Tentative - Vachet
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Tentative - Joseph
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Tentative - Solubility
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Let’s practice
45.7
45
7 mL
L off 0.500
0 500 M H2SO4 is
i required
i d tto reactt completely
l t l with
ith a 20
20.0
0 mL
L
sample of NaOH solution. What is the concentration of the NaOH
solution?
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Let’s practice
Adipic
Adi
i acid,
id H2C6 H8O4,is
i a material
t i l used
d ffor th
the production
d ti off nylon.
l
It iis
made commercially reaction between cyclohexane, C6H12 and O2:
2 C6H12 + 5 O2 Æ 2 H2C6 H8O4 + 2 H2O
Assume you that you carry out this reaction with 25.0 g cyclohexane and it
is the limiting reactant
reactant. If you obtain33
obtain33.5
5 g of adipic acid,
acid what is the
percent yield.
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Let’s practice
Whatt is
Wh
i the
th enthalpy
th l change
h
d
during
i th
the process iin which
hi h 100
100.0g
0 off water
t
50.0 oC is cooled to ice at -30.0 oC? The specific heats of ice and water
2.09 and 4.18 J/g-K, respectively. For H2O, ΔHfus = 6.01 kJ/mol.
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Let’s practice
Suppose you b
S
burn 1
1.500g
500 off b
benzoic
i acid,
id C6H5CO2H,
H iin a constant
t t volume
l
calorimeter and find that the temperature increases from 22.50 oC to 31.69
oC. The calorimeter contains 775 g of water, and the bomb has a heat
capacity of 893 J/K
J/K. Calculate the molar heat of combustion of benzoic
acid.
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Let’s practice
2, O +
Wh t is
What
i the
th Bond
B dO
Order
d O2, O2-, O222
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Let’s practice
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Let’s practice
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Let’s practice
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Let’s practice
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Let’s practice
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Let’s practice
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Let’s practice
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