MULTIPLE CHOICE.
1) The density (in g/cm3 ) of a gold nugget that has a volume of 1.68 cm 3 and a mass of 32.4 g is __________.
A) 0.0519
B) 32.4
C) 54.4
D) 0.0184
2) Which pair of atoms constitutes a pair of isotopes of the same element?
A)
20
X
10
21
X
11
B)
14
X
6
14
X
7
C)
17
X
9
17
X
8
D)
19
X
10
E) 19.3
19
X
9
E)
14
X
6
12
X
6
3) The
H for the solution process when solid sodium hydroxide dissolves in water is -44.4 kJ/mol. When a 13.9g
sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from
23.0°C to ________°C. Assume that the solution has the same specific heat as liquid water, i.e., 4.18 J/g-K.
A) 37.8°C
B) 24.0°C
C) 40.2°C
D) 37.0°C
E) 35.2°C
4) 1 kilogram = __________ milligrams
A) 1,000,000
B) 1,000
C) 1 × 10-6
D) 10,000
E) none of the above
5) How many moles of K + are present in 343 mL of a 1.27 M solution of K 3 PO4 ?
A) 11.1
B) 0.436
C) 0.145
D) 3.70
E) 1.31
6) The value of
H° for the reaction below is -126 kJ. The amount of heat that is released by the reaction of 25.0 g
of Na 2 O2 with water is __________ kJ.
2Na2 O2 (s) + 2H2 O (l)
A) 40.4
4NaOH (s) + O2 (g)
B) 67.5
C) 80.8
D) 20.2
E) -126
7) What is the maximum mass in grams of NH 3 that can be produced by the reaction of 1.0 g of N2 with 3.0 g of
H2 via the equation below?
N2 (g) + H2 (g)
A) 4.0
NH 3 (g) (not balanced)
B) 0.61
C) 17
D) 1.2
E) 2.0
8) The electron-domain geometry and molecular geometry of iodine trichloride are __________ and __________,
respectively.
A) T-shaped, trigonal planar
B) tetrahedral, trigonal pyramidal
C) trigonal bipyramidal, T-shaped
D) octahedral, trigonal planar
E) trigonal bipyramidal, trigonal planar
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9) The charge on the manganese in the salt MnF3 is __________.
A) -1
B) +1
C) +2
D) -2
E) +3
10) __________ hybrid orbitals are used for bonding by Xe in the XeF4 molecule.
A) sp2
B) sp3 d
C) sp3
E) sp3 d2
D) sp
11) Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar?
A) Na > Mg > Si > P > Ar
B) Mg > Na > P > Si > Ar
C) Ar > Si > P > Na > Mg
D) Si > P > Ar > Na > Mg
E) Ar > P > Si > Mg > Na
12)
(0.002843) (12.80184)
= __________
0.00032
A) 113.73635
C) 1.1 × 102
B) 113.736
13) Given the data in the table below,
is __________ kJ.
Substance
C2 H 4 (g)
C2 H 5 OH (l)
H°rxn for the reaction C2 H 5 OH (l) + O2 (g)
E) 113.74
CH3 CO2 H (l) + H2 O (l)
Hf° (kJ/mol)
52.3
-277.7
CH3 CO2 H (l)
H2 O (l)
D) 113.7
-484.5
-285.8
A) -476.4
B) -1048.0
C) -79.0
D) -492.6
E) The value of
Hf° of O2 (g) is required for the calculation.
14) A typical triple bond __________.
A) consists of two
bonds and one
bond
B) consists of six shared electron pairs
C) consists of three shared electrons
D) is longer than a single bond
E) consists of one
bond and two
bonds
15) The hybridization of the terminal carbons in the H2 C C CH2 molecule is __________.
A) sp3 d
B) sp3 d2
C) sp2
D) sp
E) sp3
C) 333.7
D) 3337
E) 0.3337
16) 3.337 g/cm3 = __________ kg/m 3
A) 3.337 × 10-9
B) 3.337 × 10-5
2
17) The formula of the carbonate ion is __________.
A) CO3 3-
B) CO2 2-
C) CO-
D) CO3 2-
E) CO2 -
18) Ham radio operators often broadcast on the 6-meter band. The frequency of this electromagnetic radiation is
__________ MHz.
A) 500
B) 20
C) 200
D) 2.0
E) 50
19) The correct name for Al 2 O3 is __________.
A) dialuminum oxide
B) aluminum oxide
C) aluminum trioxide
D) aluminum hydroxide
E) dialuminum trioxide
20) The correct result (indicating the proper number of significant figures) of the following addition is __________.
12
1.2
0.12
+ 0.012
A) 13
B) 13.3
C) 13.33
D) 13.332
E) none of the above
21) When 0.500 mol of HC2 H3 O2 is combined with enough water to make a 300 mL solution, the concentration of
HC2 H3 O2 is __________ M.
A) 0.835
B) 0.00167
C) 0.150
D) 3.33
E) 1.67
22) An aliquot (28.7 mL) of a KOH solution required 31.3 mL of 0.118 M HCl for neutralization. What mass (g) of
KOH was in the original sample?
A) 7.2
B) 0.17
C) 0.21
D) 0.42
E) 1.6
23) The correct name for HClO3 is __________.
A) hydrochlorous acid
B) chlorous acid
C) perchloric acid
D) chloric acid
E) hydrochloric acid
24) A 17.5 mL sample of an acetic acid (CH3 CO2 H) solution required 29.6 mL of 0.250 M NaOH for neutralization.
The concentration of acetic acid was __________ M.
A) 0.21
B) 0.15
C) 0.42
3
D) 130
E) 6.8
25) The initial or tentative explanation of an observation is called a(n) __________.
A) test
B) theory
C) law
D) hypothesis
E) experiment
26) The value of
H° for the reaction below is -72 kJ. __________ kJ of heat are released when 1.0 mol of HBr is
formed in this reaction.
H2 (g) + Br2 (g)
2HBr (g)
A) 72
B) 144
C) 0.44
D) 36
E) -72
D) 4.5 × 10-25
E) 6.0 × 10-23
27) The energy of a photon that has a wavelength of 9.0 m is __________ J.
A) 2.7 × 109
B) 4.5 × 1025
C) 2.2 × 10-26
28) Combustion of a 0.9835-g sample of a compound containing only carbon, hydrogen, and oxygen produced
1.900 g of CO2 and 1.070 g of H2 O. What is the empirical formula of the compound?
A) C4 H10O
B) C4 H11O2
C) C4 H10O2
D) C2 H5 O2
E) C2 H5 O
29) In general, as you go across a period in the periodic table from left to right:
(1) the atomic radius __________;
(2) the electron affinity becomes __________ negative; and
(3) the first ionization energy __________.
A) decreases, decreasingly, increases
B) increases, increasingly, increases
C) increases, increasingly, decreases
D) decreases, increasingly, decreases
E) decreases, increasingly, increases
30) When the following equation is balanced, the coefficient of water is __________.
N2 O5 (g) + H2 O (l)
A) 4
HNO3 (aq)
B) 5
C) 2
D) 3
E) 1
31) Of the following transitions in the Bohr hydrogen atom, the __________ transition results in the emission of the
highest-energy photon.
A) n = 6
n=1
B) n = 6
n=3
C) n = 1
n=6
D) n = 1
n=4
E) n = 3
n=6
32) The specific heat of liquid bromine is 0.226 J/g-K. How much heat (J) is required to raise the temperature of
10.0 mL of bromine from 25.00°C to 27.30°C? The density of liquid bromine: 3.12 g/mL.
A) 16.2
B) 32.4
C) 10.4
D) 5.20
E) 300
C) 1 × 108
D) 1 × 10-8
E) 1 × 1010
D) 3.0 × 1025
E) 50
33) 1 picometer = __________ centimeters
A) 1 × 10-10
B) 1 × 10-12
34) There are __________ sulfur atoms in 25 molecules of C4 H4 S2 .
A) 1.5 × 1025
B) 6.02 × 1023
C) 4.8 × 1025
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35) The formula of the Sulfite ion is __________ and bicarbonate is ___________
A) SO3
2-
and CO3 2-
B) SO2 3- and CO3 2-
C) SO3 2- and HCO3 -
D) SO4 2- and CO3 2E) SO4
2-
and HCO3 -
36) The correct name for CCl4 is __________.
A) carbon chlorate
B) carbon chloride
C) carbon tetrachlorate
D) carbon tetrachloride
E) carbon perchlorate
37) Precision refers to __________.
A) how close a measured number is to the calculated value
B) how close a measured number is to infinity
C) how close a measured number is to zero
D) how close a measured number is to the true value
E) how close a measured number is to other measured numbers
38) The number 1.00430 has __________ significant figures.
A) 4
B) 2
C) 5
D) 6
E) 3
39) Which one of the following is a pure substance?
A) elemental copper
B) concrete
C) milk
D) wood
E) salt water
40) The ground state electron configuration of Fe is __________.
A) 1s2 2s2 3s2 3p6 3d6
B) 1s2 2s2 2p6 3s2 3p6 3d6 4s2
C) 1s2 2s2 2p6 3s2 3p6 4s2
D) 1s2 2s2 3s2 3p10
E) 1s2 2s2 2p6 3s2 3p6 4s2 4d6
41) How many grams of sodium chloride are there in 550 mL of a 1.90 M aqueous solution of sodium chloride?
A) 30.5
B) 61.1
C) 122
5
D) 1.05
E) 6.11 × 104
42) Accuracy refers to __________.
A) how close a measured number is to the calculated value
B) how close a measured number is to other measured numbers
C) how close a measured number is to infinity
D) how close a measured number is to the true value
E) how close a measured number is to zero
43) The O-C-O bond angle in the CO3 2- ion is approximately __________.
A) 109.5°
B) 60°
C) 120°
D) 90°
E) 180°
44) When the following equation is balanced, the coefficient of Al2 O3 is __________.
Al2 O3 (s) + C (s) + Cl2 (g)
A) 2
AlCl3 (s) + CO (g)
B) 5
C) 4
D) 1
E) 3
45) The correct name for HIO2 is __________.
A) iodous acid
B) hydriodic acid
C) periodic acid
D) hypoiodic acid
E) periodous acid
46) The hybridizations of bromine in BrF5 and of arsenic in AsF5 are __________ and __________, respectively.
A) sp3 , sp3 d
B) sp3 d, sp3 d2
C) sp3 d2 , sp3 d
D) sp3 d2 , sp3 d2
E) sp3 d, sp3
47) Combining aqueous solutions of BaI2 and Na2 SO4 affords a precipitate of BaSO4 . Which ion(s) is/are spectator
ions in the reaction?
A) Na+ only
B) Ba2+ only
C) Ba2+ and SO4 2D) SO4 2- and IE) Na+ and I48) What is the formula of the compound formed between strontium ions and nitrogen ions?
A) SrN2
B) SrN
C) Sr2 N 3
D) SrN3
E) Sr3 N 2
B) F2
C) O2
D) C2
E) Li2
D) FeBr2
E) FeBr
49) Ignore
A) N2
50) The correct formula of iron(III) bromide is __________.
A) Fe3 Br
B) FeBr3
C) Fe3 Br3
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