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1) The melting and boiling points of hydrocarbons are determined by ________.
A) ion-dipole attraction
B) dipole-dipole attraction
C) London forces
D) hydrogen bonding
E) ionic bonding
2) The value of ΔH° for the reaction below is -790 kJ. The enthalpy change
accompanying the reaction of 0.95 g of S is ________ kJ.
2S (s) + 3O2 (g) → 2SO3 (g)
A) 23
B) -23
C) -12
D) 12
E) -790
3) What is the formula for phosphoric acid?
A) H3PO4
B) H2PO4
C) H4PO4
D) H3PO3
E) none of the above
4) The Lewis structure of HCN (H bonded to C) shows that ________ has ________
nonbonding electron pair(s).
A) C, 1
B) N, 1
C) H, 1
D) N, 2
E) C, 2
5) How many atoms of nitrogen are in 10 g of NH4NO3?
A) 3.5
B) 1.5 x 1023
C) 3.0 x 1023
D) 1.8
E) 2
6) Of the following, ________ is the most volatile.
A) C2H6
B) C2I6
C) C2Br6
D) C2Cl6
E) C2F6
7) A temperature of 100. °F is the same as ________ °C.
A) 38
B) 212
C) 700.
D) 373
E) -173
8) Determine the pOH of a 0.10 M aqueous solution of KF. For hydrofluoric acid, Ka =
7.0 x 10-4.
A) 1.00
B) 5.92
C) 8.08
D) 5.01
E) 1.58
9) How many neutrons are emitted when a californium-249 nucleus (Z=98) is
bombarded with a nitrogen-15 nucleus to produce a Db nucleus?
A) two
B) three
C) four
D) one
E) zero
10) Of the following, ________ radiation has the shortest wavelength.
A) X-ray
B) radio
C) microwave
D) ultraviolet
E) infrared
11) 45 m/s = ________ km/hr
A) 2.7
B) 0.045
C) 1.6 X 102
D) 2.7 X 103
E) 1.6 X 105
12) What is the coefficient of O2 when the following equation is completed and
balanced?
C4H8O2 + O2 → ________
A) 2
B) 3
C) 5
D) 6
E) 1
13) What is the molecular formula for pentane?
A) C2H8
B) C3H6
C) C4H8
D) C5H12
E) C5H10
14) A solution of NaF is added dropwise to a solution that is 0.0122 M in Ba2+. When
the concentration of F- exceeds ________ M, BaF2 will precipitate. Neglect volume
changes. For BaF, Ksp = 1.7 x 10-6.
A) 7.0 x 10-5
B) 1.2 x 10-2
C) 2.1 x 10-8
D) 3.0 x 10-3
E) 1.4 x 10-4
15) Which periodic table group contains only metals?
A) 8A
B) 2A
C) 6A
D) 7A
E) 5A
16) Of the following substances, an aqueous solution of ________ will form basic
solutions.
NH4ClCu(NO3)2K2CO3NaF
A) NH4Cl, Cu(NO3)2
B) K2CO3, NH4Cl
C) NaF only
D) NaF, K2CO3
E) NH4Cl only
17) Ozone is a(n) ________ of oxygen.
A) isomer
B) allotrope
C) isotope
D) resonance structure
E) atomic form
18) ________ are found uncombined, as monatomic species in nature.
A) Noble gases
B) Chalcogens
C) Alkali metals
D) Alkaline earth metals
E) Halogens
19) The "dentation" of a ligand is defined by ________.
A) how many "dents" or "deceptions" there are in the coordination sphere of a complex
species it forms
B) how many electron donor atoms it utilizes to form coordinate bonds to the central
metal ion
C) the total number of lone pairs of electrons it possesses
D) how many metal ions it can sequester from solution
E) none of the above
