For each group of compounds listed, which is the strongest acid?
I. HIO2, HIO3, HIO4
II. H2Se, H2S, H3As
III. HPO2, HClO2, HBrO2
A) I. HIO2, H2Se, HBrO2
B) I. HIO4, H2Se, HBrO2
C) I. HIO2, H3As, HPO2
D) I. HIO3, H3As, HClO2
E) I. HIO4, H2Se, HClO2
Which of the following elements has the highest electronegativity?
A) Al
B) In
C) S
D) Ba
E) O
Consider the molecule and the following hybridization choices:
What is the hybridization of the nitrogen atom?
A)sp
B)sp2
C)sp3
D)dsp3
E)d2sp3
Here are some crystal field representations of d electrons in an octahedral complex:
Choose the representation that fits the transition metal atom in the following species:
Fe(OH2)6
3+(assume weak field)
A) representation I
B) representation II
C) representation III
D) representation IV
E) representation V
Which energy conversion shown below takes place in a galvanic cell?
A) electrical to chemical
B) chemical to electrical
C) mechanical to chemical
D) chemical to mechanical
E) mechanical to electrical
Consider the following portion of the energy-level diagram for hydrogen:
n = 4 −0.1361 x 10−18J
n = 3 −0.2420 x 10−18J
n = 2 −0.5445 x 10−18J
n = 1 −2.178 x 10−18J
For which of the following transitions does the light emitted have the longest
wavelength?
A)n = 4 to n = 3
B)n = 4 to n = 2
C)n = 4 to n = 1
D)n = 3 to n = 2
E)n = 2 to n = 1
If n = 2, how many orbitals are possible?
A)3
B)4
C)2
D)8
E)6
Given the heats of the following reactions:
DH°(kJ)
I. P4(s) + 6Cl2(g) –> 4PCl3(g)-1225.6
II.P4(s) + 5O2(g) –> P4O10(s)-2967.3
III.PCl3(g) + Cl2(g) –> PCl5(g) -84.2
IV. PCl3(g) + O2(g) –> Cl3PO(g)-285.7
Calculate the value of DH° for the reaction below:
P4O10(s) + 6PCl5(g) –> 10Cl3PO(g)
A)-110.5 kJ
B)-610.1 kJ
C)-2682.2 kJ
D)-7555.0 kJ
E)None of these is within 5% of the correct answer.
If a compound has a number of individual dipoles, then:
I.It is polar overall.
II.There is an electronegativity difference between the bonded atoms.
III.it is ionic.
IV.It doesn’t have resonance.
A)II only
B)II, IV
C)I, II, IV
D)I, III
E)All of the above statements are correct.
Consider the following processes:
DH (kJ/mol)
3B –> 2C + D -125.
(1/2)A –> B 150
E + A –> D 350
Calculate DH for: B –> E + 2C
A)325 kJ/mol
B)525 kJ/mol
C)-175 kJ/mol
D)-325 kJ/mol
E)none of these
You analyze for pyridine (Kbis approximately 10-9) by dissolving 0.1000 g of complex
in 10 mL of H2O and titrating with a 0.01 M HCl solution. Which of the following
indicators should be used to detect the endpoint? (Assume that the initial concentration
of pyridine is approximately 0.01 M.)
A) bromophenol blue, pH range of color change = 3.0-4.6
B) methyl red, pH range of color change = 4.8-6.0
C) bromothymol blue, pH range of color change = 6.0-7.6
D) thymol blue, pH range of color change = 8.0 -9.6
E) alizarin yellow, pH range of color change = 10.1-12.0
Select the correct molecular structure for the given species from the choices below:
H2O
A)linear
B)trigonal planar
C)tetrahedral
D)bent
E)none of these
Given the following acids and Kavalues:
What is the order of increasing base strength?
A) CN–, F–, OAc–, ClO4
–
B) CN–, OAc–, F–, ClO4
–
C) CN–, ClO4
–, F–, OAc–
D) ClO4
–, OAc–, CN–, F–
E) ClO4
–, F–, OAc–, CN–
The reaction A –> B + C is known to be zero order in A with a rate constant of 5.0
x10-2mol/L·s at 250C An experiment was run at 250C where [A]0= 1.0 x10-3M.What is
the concentration of B after 5 x10-3sec?
The reaction is known to be zero order in A with a rate constant of 5.0
x10-2mol/L s at 250C. An experiment was run at 250C where [A]0= 2.0 x10-3M. After
5.0 minutes, the rate is
Consider the following sets of quantum numbers. Which set(s) represent(s) impossible
combinations?
nlml
Set a101
Set b330
Set c211
Set d32-2
Set e31-2
Set f200
For the reaction aA –> Products, use the following choices
a) zero order in A
b) first order in A
c) second order in A
d) a, b, c
e) none of the above
[A] is constant.
Convert 0.3980 m to mm.
The following questions refer to the reaction between nitric oxide and hydrogen
What is the magnitude of the rate constant for this reaction?
The concentration N2O5at 100 minutes will be approximately