1) Oxides of the active metals combine with acid to form ________.
A) hydrogen gas
B) metal hydrides
C) water and a salt
D) oxygen gas
E) metal hydroxides
2) The missing product from this reaction is ________.
Se + e –> _____
A) Se
B) As
C) Se
D) Br
E) none of the above
3) Large intermolecular forces in a substance are manifested by ________.
A) low vapor pressure
B) high boiling point
C) high heats of fusion and vaporization
D) high critical temperatures and pressures
E) all of the above
4) Lithium is a ________ and magnesium is a ________.
A) nonmetal, metal
B) nonmetal, nonmetal
C) metal, metal
D) metal, metalloid
E) metalloid, metalloid
5) ________ is a disaccharide.
A) Sucrose
B) Fructose
C) Ribose
D) Cellulose
E) Uracil
6) The equilibrium-constant expression depends on the ________ of the reaction.
A) stoichiometry
B) mechanism
C) stoichiometry and mechanism
D) the quantities of reactants and products initially present
E) temperature
7) What is the maximum number of triple bonds that a carbon atom can form?
A) 4
B) 1
C) 0
D) 2
E) 3
8) When four atomic orbitals are mixed to form hybrid orbitals, how many hybrid
orbitals are formed?
A) one
B) six
C) three
D) four
E) five
9) Which species has 48 electrons?
A) Sn+2
B) Sn+4
C) Cd+2
D) Ga
E) Ti
10) The concentration of sodium chloride in an aqueous solution that is 2.13 M and that
has a density of 1.01 g/mL is ________% by mass.
A) 2.11
B) 7.83
C) 124
D) 12.3
E) 14.2
11) A typical triple bond consists of ________ sigma bond(s) and ______ pi bond(s).
A) 1, 2
B) 2, 2
C) 1, 3
D) 0, 3
E) 1, 4
12) The Keq for the equilibrium below is 0.112 at 700.0 oC.
SO2 (g) + O2 (g) SO3 (g)
What is the value of Keq at this temperature for the following reaction?
2SO3 (g) 2SO2 (g) + O2 (g)
A) 79.7
B) 2.99
C) 17.86
D) 4.46
E) 8.93
13) Solid aluminum and gaseous oxygen react in a combination reaction to produce
aluminum oxide:
4Al (s) + 3O2 (g) → 2Al2O3 (s)
The maximum amount of Al2O3 that can be produced from 2.5 g of Al and 2.5 g of O2
is ________ g.
A) 9.4
B) 7.4
C) 4.7
D) 5.3
E) 5.0
14) A helium balloon is filled to a volume of 27.7 L at 300 K. What will the volume of
the balloon become if the balloon is heated to raise the temperature to 392 K?
A) 36.2
B) 21.2
C) 0.0276
D) 0.0472
E) 3,260,000
15) Of the following solutions, which has the greatest buffering capacity?
A) 0.543 M NH3 and 0.555 M NH4Cl
B) 0.087 M NH3 and 0.088 M NH4Cl
C) 0.234 M NH3 and 0.100 M NH4Cl
D) 0.100 M NH3 and 0.455 M NH4Cl
E) They are all buffer solutions and would all have the same capacity.
16) When the following equation is balanced, the coefficient of Al2O3 is ________.
Al2O3 (s) + C (s) + Cl2 (g) → AlCl3 (s) + CO (g)
A) 1
B) 2
C) 3
D) 4
E) 5
17) The phase diagram of a substance is shown above. The area labeled ________
indicates the gas phase for the substance.
A) w
B) x
C) y
D) z
E) y and z
18) The electron-domain geometry and the molecular geometry of a molecule of the
general formula ABn will always be the same if ________.
A) there are no lone pairs on the central atom
B) there is more than one central atom
C) n is greater than four
D) n is less than four
E) the octet rule is obeyed