1) 3.2 cm3 = 0.0032 L
2) Two deviations of real gases from ideal gases which are treated in the van der Waals
equation are finite molecular volume and non-zero molecular attractions.
3) Gamma radiation only changes the atomic number but not the mass number of a
nucleus.
4) Charged particles are accelerated because the faster they move there is a greater
chance of producing a nuclear reaction.
5) The relative biological effectiveness (RBE) is tenfold greater for gamma radiation
than for alpha radiation.
6) Most transition metals do not form ions with a noble gas configuration.
7) The SI unit of an absorbed dose of radiation is the gray.
8) When the value of n is greater than or equal to 3, electrons can reside in d orbitals.
9) Ozone is a pale blue poisonous gas with an irritating odor.
10) Which halogen is the most easily oxidized?
A) F
B) Cl
C) Br
D) I
11) A sample of iron absorbs 81.0 J of heat, upon which the temperature of the sample
increases from 19.7 °C to 28.2 °C. If the specific heat of iron is 0.450 J/g-K, what is the
mass (in grams) of the sample?
A) 21.2 g
B) 4.29 g
C) -21.2 g
D) 0.0472 g
E) 3.83 g
12) Which reaction produces a decrease in the entropy of the system?
A) CaCO3 (s) –> CaO (s) + CO2 (g)
B) 2C (s) + O2 (g) –> 2CO (g)
C) CO2 (s) –> CO2 (g)
D) 2H2 (g) + O2 (g) –> 2H2O (l)
E) H2O (l) –> H2O (g)
13) Using the VSEPR model, the electron-domain geometry of the central atom in ClF3
is ________.
A) linear
B) trigonal planar
C) tetrahedral
D) trigonal bipyramidal
E) octahedral
14) The value of ΔH° for the reaction below is -482 kJ. Calculate the heat (kJ) released
to the surroundings when 38.5 g of O2 (g) reacts with excess CO.
2CO (g) + O2 (g) → 2CO2 (g)
A) 2.65 x 103 kJ
B) 482 kJ
C) 580. kJ
D) 65.7 kJ
E) 210. kJ
15) Momentum is defined as the product of mass and velocity. The SI unit for
momentum is ________.
A)
B)
C)
D)
E)
16) Given the following reactions
2NO → N2 + O2 ΔH = -180 kJ
2NO + O2 → 2NO2 ΔH = -112 kJ
the enthalpy of the reaction of nitrogen with oxygen to produce nitrogen dioxide
N2 + 2O2 → 2NO2
is ________ kJ.
A) 68
B) -68
C) -292
D) 292
E) -146
17) Which structure below is not correctly drawn?
A)
B)
C)
D)
E)
18) Of the following equilibria, only ________ will shift to the right in response to a
decrease in volume.
A) H2 (g) + Cl2 (g) 2 HCl (g)
B) 2 SO3 (g) 2 SO2 (g) + O2 (g)
C) N2 (g) + 3H2 (g) 2NH3 (g)
D) 2 Fe2O3 (s) 4 Fe (s) + 3O2 (g)
E) 2HI (g) H2 (g) + I2 (g)
19) In molecular orbital theory, the σ1s orbital is ________ and the σ1s
* orbital is
________ in the He2
+ molecule.
A) half-filled, filled
B) half-filled, half-filled
C) filled, half-filled
D) filled, empty
E) filled, filled
20) How many moles of gas are there in a 36.3 L container at 25.2 °C and 570.3 mm
Hg?
A) 1.11
B) 13.2
C) 0.863
D) 0.0110
E) 16,700
21) Consider the following reaction at equilibrium:
2SO2 (g) + O2 (g) 2SO3 (g)Ho = -99 kJ
Le Ch¢telier’s principle predicts that a(n) increase in temperature will result in
________.
A) an increase in the partial pressure of O2
B) a decrease in the partial pressure of O2
C) a decrease in the partial pressure of SO2
D) a(n) increase in Keq
E) no changes in equilibrium partial pressures
22) Of the molecules below, only ________ is nonpolar.
A) BF3
B) NF3
C) IF3
D) PBr3
E) BrCl3
23) Which one of the following is a correct representation of an alpha particle?
A) He
B) H
C) H
D) e
E) H
24) Molecular Orbital theory correctly predicts diamagnetism of fluorine gas, F2. This
is because ________.
A) the bond order in F2 can be shown to be equal to 1.
B) there are more electrons in the bonding orbitals than in the antibonding orbitals.
C) all electrons in the MO electron configuration of F2 are paired.
D) the energy of the π2pMOs is higher than that of the σ2p MO
E) the F-F bond enthalpy is very low
25) What effect does substitution of K2O for Na2O in making soda-lime glass have in
its properties?
26) What are the five crystalline allotropes of carbon?
27) What is the name of the compound CH3CH2CH(OH)CH2CH2CH3?
28) Calculate the concentration (M) of sodium ions in a solution made by diluting 50.0
mL of a 0.874 M solution of sodium sulfide to a total volume of 250 mL.
29) Electrons do not e x ist in the nucleus, yet beta emission is ejection of electrons
from the nucleus. How does this happen?
30) List three of the ten transition metals required for human life.