1) Based on the equations below, which metal is the most active?
Pb(NO3)2 (aq) + Ni (s) → Ni(NO3)2 (aq) + Pb (s)
Pb(NO3)2 (aq) + Ag (s) → No reaction
Cu(NO3)2 (aq) + Ni (s) → Ni(NO3)2 (aq) + Cu (s)
A) Ni
B) Ag
C) Cu
D) Pb
E) N
2) The solubility of Ar in water at 25 oC is 1.6 x 10-3 M when the pressure of the Ar
above the solution is 1.0 atm. The solubility of Ar at a pressure of 2.5 atm is ________
M.
A) 1.6 x 103
B) 6.4 x 10-4
C) 4.0 x 10-3
D) 7.5 x 10-2
E) 1.6 x 10-3
3) The critical temperature and pressure of CS2 are 279 oC and 78 atm, respectively. At
temperatures above 279 oC and pressures above 78 atm, CS2 can only occur as a
________.
A) solid
B) liquid
C) liquid and gas
D) gas
E) supercritical fluid
4) Consider the reaction:
NH3 (g) + HCl (g) –> NH4Cl (s)
Given the following table of thermodynamic data at 298 K:
The value of K for the reaction at 25 oC is ________.
A) 150
B) 9.3 x 1015
C) 8.4 x 104
D) 1.1 x 10-16
E) 1.4 x 108
5) The carbon-14 dating method can be used to determine the age of a ________.
A) flint arrowhead
B) papyrus scroll
C) stone a x e head
D) clay pot
E) rock
6) The complex [Zn(NH3)2Cl2]2+ does not exhibit cis-trans isomerism. The geometry of
this complex must be ________.
A) tetrahedral
B) trigonal bipyramidal
C) octahedral
D) square planar
E) either tetrahedral or square planar
7) Of the following acids, ________ is a strong acid.
A) HNO2
B) H2CO3
C) HNO3
D) HClO
E) HF
8) Which species below is the nitride ion?
A) Na+
B) NO3
–
C) NO2
–
D) NH4
+
E) N3-
9) Ozone is a necessary, protective component of the ________, but is considered a
pollutant in the ________.
A) troposphere, upper atmosphere
B) troposphere, air
C) photochemical smog, air we breathe
D) upper atmosphere, troposphere
E) air we breathe, upper atmosphere
10) With what compound will NH3 experience only dispersion intermolecular forces?
A) BF3
B) LiF
C) CH3I
D) CH3OH
E) HCN
11) What drives the turbine in a nuclear power plant?
A) the moderator
B) steam
C) the control rods
D) the primary coolant
E) UF6 gas
12) In the following list, only ________ is not an example of a chemical reaction.
A) dissolution of a penny in nitric acid
B) the condensation of water vapor
C) a burning candle
D) the formation of polyethylene from ethylene
E) the rusting of iron
13) The central atom in a certain molecule has 4 nonbonded electron pairs and 2 bonded
electron pairs in its valence shell. The molecular geometry of this molecule is
________.
A) seesaw
B) square planar
C) linear
D) trigonal bipyramidal
E) T-shaped
14) What is the pH of a sodium acetate (NaC2H3O2) solution prepared by adding 0.820
grams of sodium acetate to 100.0 ml of water at 25.0 oC? The Ka at 25.0 oC for acetic
acid is 1.8 x 10-5.
15) Three molecules have similar electron domains, but different molecular shapes.
Why?
16) Determine the mass percent (to the hundredths place) of C in sodium bicarbonate
(NaHCO3).
17) Name the compound: K2[Cr(H2O)4(CO3)2].
18) Astatine decays by ________.
19) Cu is the symbol for the element ________.