1) Accuracy refers to ________.
A) how close a measured number is to zero
B) how close a measured number is to the calculated value
C) how close a measured number is to other measured numbers
D) how close a measured number is to the true value
E) how close a measured number is to infinity
2) Consider a complex in which manganese (III) is bonded to six identical ligands.
Which one of the following ligands will result in the smallest value of ?
A) Cl–
B) NH3
C) H2O
D) F–
E) CN–
3) The average rate disappearance of A between 20 s and 30 s is ________ mol/s.
A) 5.0 x 10-4
B) 1.6 x 10-2
C) 1.5 x 10-3
D) 670
E) 0.15
4) In the Arrhenius equation,
k = Ae-Ea/RT
________ is the frequency factor.
A) k
B) A
C) e
D) Ea
E) R
5) The mass % of H in methane (CH4) is ________.
A) 25.13
B) 4.032
C) 74.87
D) 92.26
E) 7.743
6) The density (in g/cm3) of a gold nugget that has a volume of 1.68 cm3 and a mass of
32.4 g is ________.
A) 0.0519
B) 19.3
C) 54.4
D) 0.0184
E) 32.4
7) Which one of the following is a Brnsted-Lowry acid?
A) (CH3)3NH+
B) CH3COOH
C) HF
D) HNO2
E) all of the above
8) A supersaturated solution ________.
A) is one with more than one solute
B) is one that has been heated
C) is one with a higher concentration than the solubility
D) must be in contact with undissolved solid
E) exists only in theory and cannot actually be prepared
9) ________ is isoelectronic with helium.
A) H–
B) H+
C) H
D) B3-
E) N3-
10) The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is
the mass defect (in amu) of a Ni nucleus? (The mass of a nickel-60 nucleus is
59.9308 amu.)
A) 0.5449
B) 1.2374
C) 0.5491
D) 28.7930
E) 1.3066
11) Which one of the following is the correct formula for pentaamminechlorocobalt
(III) chloride?
A) [Co(NH3)5Cl]Cl2
B) [Co(NH3)4Cl]Cl2
C) [Co(NH3)6Cl]Cl2
D) [Co(NH3)5]Cl4
E) [Cl(NH3)5Co]Co2
12) Of the elements below, ________ is the least metallic.
A) Ne
B) F
C) Cl
D) O
E) S
13) A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is
751 torr. Use Boyle’s law to calculate the pressure (torr) when the volume is reduced to
7.25 L at a constant temperature of
25.0 °C.
A) 1.04 x 103
B) 0.097
C) 5.44 x 104
D) 544
E) 1.36
14) Write the balanced equation for the reaction that occurs when methanol, CH3OH (l),
is burned in air. What is the coefficient of methanol in the balanced equation?
A) 1
B) 2
C) 3
D) 4
E) 3/2
15) Which electron configuration represents a violation of Hund’s rule for an atom in its
ground state?
A)
B)
C)
D)
E)
16) How many radioactive decay series e x ist in nature?
A) 0
B) 1
C) 2
D) 3
E) 10
17) A solution contains 11% by mass of sodium chloride. This means that ________.
A) there are 11 g of sodium chloride in in 1.0 mL of this solution
B) 100 g of the solution contains 11 g of sodium chloride
C) 100 mL of the solution contains 11 g of sodium chloride
D) the density of the solution is 11 g/mL
E) the molality of the solution is 11