CAS CH 686 Quiz 1

subject Type Homework Help
subject Pages 4
subject Words 589
subject Authors Steven S. Zumdahl, Susan A. Zumdahl

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page-pf1
A sample of a gas occupies a volume of 2.62 liters at 25 °C and 1.00 atm. What will be
the volume at 50.0 °C and 2.00 atm?
A)1.42 liters
B)2.62 liters
C)4.83 liters
D)5.68 liters
E)10.5 liters
Use the molecules below to answer the next three questions.
Which molecule(s) have at least one carbon atom that is sp hybridized?
A)I
B)II
C)III
D)all of the above
E)none of the above
The ground state electron configuration for Te is:
A)[Kr]5s24d105p4
B)[Kr]5s25p64d8
C)[Kr]5s25d105p4
D)[Kr]5s24f14
E)Kr]5s25d105p6
The following three equations represent equilibria that lie far to the right.
page-pf2
Identify the strongest base.
A) CH3O-
B) CH3OH
C) CN-
D) H2O
E) NO3
-
Which of the following compounds is expected to have the HIGHEST boiling point?
A)CH3OCH3
B)CH3CH2OH
C)CH3CH2CH2CH3
D)CH3CH2CH3
E)CH3Cl
Consider the following equilibrium: 2NOCl(g) 2NO(g) + Cl2(g) with K=1.6x10-5.
In an experiment, 1.00 mole of pure NOCl and 1.00 mole of pure Cl2are placed in a
1.00-L container.
If x moles of NOCl react, what is the equilibrium concentration of NO?
A) x
B) 2x
C) -x
D) -2x
E) x2
An atom of 186Ta has a mass of 185.958540 amu. Calculate the mass defect (deficit) in
amu/atom.
A) 1.591
B) 0
C) 1482
D) 7.97
E) 1.442
page-pf3
A 36.2g piece of metal is heated to 81°C and dropped into a calorimeter containing 50.0
g of water (specific heat capacity of water is 4.18 J/g°C) initially at 21.7°C. The empty
calorimeter has a heat capacity of 125 J/K. The final temperature of the water is 29.7°C.
Ignoring significant figures, calculate the specific heat of the metal..
A)1.439 J/gK
B)0.900 J/gK
C)0.360 J/gK
D)0.968 J/gK
E)none of these
Select the stronger acid from each pair:
I. HBr, HI
II HClO2, HClO3
IIIH2SO3, HClO3
A) HIHClO2HClO3
B) HBrHClO3H2SO3
C) HIHClO3H2SO3
D) HBrHClO2HClO3
E) HIHClO3HClO3
For a certain process, at 300. K, G = -12.2 kJ and H = -7.0 kJ. If the process is
carried out so that no useful work is performed, G is
A) 12.2 kJ
B) 7.0 kJ
C) 0
D) -7.0 kJ
E) -12.2 kJ
Consider the reaction
2N2O5(g) 4NO2(g) + O2(g)
at 25°C for which the following data are relevant:
page-pf4
Calculate G° for the reaction at 25°C.
A) -1.35 x 105kJ
B) 98.7 kJ
C) -25.2 kJ
D) 135 kJ
E) 0
Consider the molecular orbital energy level diagrams for O2and NO. Which of the
following is true?
I.Both molecules are paramagnetic.
II.The bond strength of O2is greater than the bond strength of NO.
III.NO is an example of a homonuclear diatomic molecule.
IV.The ionization energy of NO is smaller than the ionization energy of NO+.
A)I only
B)I and II
C)I and IV
D)II and III
E)I, II, and IV

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