1) In humans, what percent of absorbed iron is found in blood?
A) 15
B) 25
C) 40
D) 60
E) 75
2) All the elements in group 8A are gases at room temperature. Of all the groups in the
periodic table, only group ________ contains examples of elements that are gas, liquid,
and solid at room temperature.
A) 2A
B) 1A
C) 7A
D) 5A
E) 6A
3) Which of the following has dispersion forces as its only intermolecular force?
A) CH4
B) HCl
C) C6H13NH2
D) NaCl
E) CH3Cl
4) Sugars are examples of what type of molecule?
A) proteins
B) carbohydrates
C) nucleic acids
D) amino acids
E) salts
5) For a given reaction with H = -28.1 kJ/mol, the G = 0 at 372 K. The value of S
must be
________ J/K-mol, assuming that H and S do not vary with temperature.
A) -75.5
B) 75.5
C) -7.55 x 10-5
D) 7.55 x 10-5
E) -1.32 x 10-2
6) Which one of the following is false concerning tritium?
A) It is radioactive, emitting alpha particles with a half-life of 12.3 yr.
B) It can be produced by neutron bombardment of lithium-6.
C) It is formed continuously in the upper atmosphere.
D) It has the same chemical properties as protium but reacts more slowly.
E) The atomic number of tritium is 1.
7) Of the following, a 0.1 M aqueous solution of ________ will have the lowest
freezing point.
A) NaCl
B) Al(NO3)3
C) K2CrO4
D) Na2SO4
E) sucrose
8) Thermodynamic Quantities for Selected Substances at 298.15 K (25 oC)
The value of S o for the decomposition of calcium chloride into its constituent
elements,
CaCl2 (s) –> Ca (s) + Cl2 (g)
is ________ J/K mol.
A) -104.6
B) +104.6
C) +369.0
D) -159.8
E) +159.8
9) Which one of the following is not one of the postulates of Dalton’s atomic theory?
A) Atoms are composed of protons, neutrons, and electrons.
B) All atoms of a given element are identical; the atoms of different elements are
different and have different properties.
C) Atoms of an element are not changed into different types of atoms by chemical
reactions: atoms are neither created nor destroyed in chemical reactions.
D) Compounds are formed when atoms of more than one element combine; a given
compound always has the same relative number and kind of atoms.
E) Each element is composed of extremely small particles called atoms.
10) The equilibrium constant for a reaction is 0.38 at 25 oC. What is the value of G o
(kJ/mol) at this temperature?
A) 2.4
B) -4.2
C) 200
D) 4.2
E) More information is needed.
11) What is the coordination number of cobalt in [Co(NH3)5Cl](NO3)2?
A) 12
B) 8
C) 4
D) 2
E) 6
12) How many grams of NaOH (MW = 40.0) are there in 500.0 mL of a 0.250 M NaOH
solution?
A) 0.00219
B) 114
C) 14.0
D) 5.00
E) 0.125
13) The condensed electron configuration of titanium, element 22, is ________.
A) [Ar]3s23p6
B) [Ne]3s4
C) [Ar]3s43p4
D) [Ar]3d24s2
E) [Ne]3s43p2
14) The volume of hydrogen gas at 45.0 °C and 699 torr that can be produced by the
reaction of 5.66 g of zinc with excess sulfuric acid is ________ L.
A) 2.84
B) 2.71 x 10-4
C) 3.69 x 104
D) 2.45
E) 0.592
15) The property responsible for the “beading up” of water is ________.
A) density
B) viscosity
C) vapor pressure
D) surface tension
E) hydrogen bonding