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Chem Final

Terms in this set (19)

Which of the following processes is exothermic?
a.
Cl2(g) → 2Cl(g)
b.
Li(s) → Li(g)
c.
NaF(s) → Na⁺(g) + F ⁻(g)
d.
None of these are exothermic.
e.
Br(g) + e⁻ → Br ⁻(g)
E
Predict the products of the following reaction.
NH4Cl(aq) + NaBr(aq) → ??
a.
NH3BrCl(aq) + Na(s)
b.
NH4Br(aq) + NaCl(s)
c.
NH4Br(s) + NaCl(aq)
d.
NH4Cl(s) + NaBr(aq)
e.
No Reaction
E
Which of the following signs on q and w represent a system that is doing work on its surroundings, as well as receiving heat from its surroundings?
a.
q = +, w = -
b.
none of these accurately describe the referenced system
c.
q = +, w = +
d.
q = -, w = -
e.
q = -, w = +
A
The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
a.
0.25 M
b.
0.10 M
c.
0.36 M
d.
0.20 M
e.
0.40 M
D
Which of the following ions will not spontaneously react with Zn(s) in solution?
Cu2+ Mn2+ Ni2+ Pb2+
a.
Mn2+
b.
Ni2+
c.
Pb2+
d.
All four of these ions will spontaneously react with Zn(s) in solution.
e.
Cu2+
A
Determine the oxidation state of CO3(-2).
a.
+2
b.
-4
c.
+4
d.
+6
e.
-2
C
Which ionic compound would be expected to have the largest lattice energy?
a.
Al2S3
b.
AlCl3
c.
MgCl2
d.
NaCl
e.
MgO
A
Indicate the ground state electron configuration for the ion of Ba.
a.
[Kr]5s24d105p66s2
b.
[Kr]5s24d105p66s26p2
c.
[Kr]5s25p6
d.
[Kr]5s24d105p6
e.
[Kr]5s24d105p66s1
D
Which type(s) of intermolecular forces are present in ammonia (NH3)?
a.
dispersion forces
b.
dipole-dipole forces
c.
hydrogen bonding
d.
a and b only
e.
all of them
E
Which of the following is the strongest intermolecular force of attraction?
a.
Hydrogen Bonding
b.
Dipole - Dipole
c.
Dispersion
d.
Hydrogen - Dipole
e.
Ion - Dipole
E
Indicate the electron geometry and molecular geometry for ammonia (NH3).
a.
eg = trigonal planar, mg = trigonal planar
b.
eg = trigonal pyramidal, mg = tetrahedral
c.
eg = tetrahedral, mg = trigonal planar
d.
eg = trigonal pyramidal, mg = trigonal pyramidal
e.
eg = tetrahedral, mg = trigonal pyramidal
E
How many of the following molecules are polar?
BrCl3 CS2 SiF4 SO3
a.
1
b.
2
c.
3
d.
4
e.
0
A
Indicate the approximate bond angle for a molecule with an octahedral shape.
a.
105o
b.
180o
c.
120o
d.
109.5o
e.
90o
E
Arrange the following elements in order of increasingly negative electron affinity values (i.e., increasing electron affinity):
B N O F
a.
F < O < N < B
b.
B < N < O < F
c.
N < F < O < B
d.
F < O < B < N
e.
N < B < O < F
E
Identify the compound with atoms that have an incomplete octet.
a.
ICl5
b.
Cl2
c.
BF3
d.
CO
e.
CO2
C
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