Download Chemistry Fall Semester Practice Exam 2

Chemistry Fall Semester Practice Exam 2
Name_______________________________
Write the letter for the correct answer to the following questions on the provided answer sheet.
1.
2.
Expand the following number:
a. 0.000813754
b. 81,375.4
8.13754 x 10 4
d. 0.000814
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c. 81,400
Express the following number in scientific notation:
59,967,300
7
7
a. 6.00 x 10
b. 6.00 x 10
c. 5.99673 x 10 7
d. 5.99673 x 107
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3.
Complete the following conversion:
a. 3.84 x 101
b. 3.84 x 1021
3.84 x 1011 hm = ??? Tm
c. 3.84 x 107
d. 3.84 x 1015
4.
Complete the following conversion:
a. 7.89 x 10 15
b. 7.89 x 10 6
7.89 x 10 14 Ms = ??? cs
c. 7.89 x 10 22
d. 7.89 x 10 13
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5.
Determine the number of significant digits in the following number:
a. 3
b. 5
c. 6
d. 7
1,001,001
6.
Determine the number of significant digits in the following number:
a. 2
b. 3
c. 4
d. 5
3.0500
7.
Determine the number of significant digits in the following number:
a. 1
b. 4
c. 5
d. 6
5 x 105
8.
Determine the number of significant digits in the following number:
0.000028930
a. 4
b. 5
c. 9
d. 10
9.
All arsenic compounds are poisonous, so they have been the favorites of writers of mystery
novels for years. Arsenic can be detected in the stomach of a victim of poisoning by the Marsh
test. The last reaction in this test is as follows. What is the coefficient of water in the balanced
reaction?
___ H3AsO4 + ___ H2 → ___ AsH3 + ___ H2O
a. 1
b. 2
c. 3
d. 4
10.
The proper set of coefficients for the following equation are:
___ Ca5(PO4)3F + ___ H2SO4 → ___ Ca(H2PO4)2 + ___ HF + ___ CaSO4
a. 1, 2, 5, 1, 2
b. 1, 2, 3, 1, 2
c. 2, 7, 3, 2, 7
d. 3, 10, 5, 3, 10
11.
The formula for picric acid is C6H3N3O7. Calculate the percent of carbon in picric acid.
a. 31.4%
b. 48.9%
c. 1.32%
d. 18.3%
12.
What is the molar mass of iron to three significant figures?
a. 56.0
b. 55.9
c. 55.8
13.
d. 55.7
The atomic number and atomic mass, respectively, for arsenic, are:
a. 18, 40
b. 51, 122
c. 85, 210
d. 33, 74
14.
What is the charge of an ion with 36 electrons, 54 neutrons, and 42 protons?
a. +12
b. +6
c. −12
d. −6
15.
A sample of a metal weighs 5.08 x 10 5 µg. If the density is 0.00321 g/cm3, what is its volume?
a. 1.58 x 104 cm3
b. 1.58 x 10 8 cm3
c. 1.63 x 10 13 cm3 d. 1.58 x 10 2 cm3
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16.
17.
18.
19.
20.
The “f” orbitals can hold _____ electrons.
a. 2
b. 6
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c. 10
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d. 14
The elements of Group 18 are called _____.
a. Halogens
b. Alkali Metals
c. Alkaline Earth Metals
d. Noble Gases
Classify tellurium as a metal, nonmetal, or metalloid.
a. Metal
b. Nonmetal
c. Metalloid
d. Medal
Groups 1 through 2 are filling ________ orbitals.
a. s
b. p
c. d
d. f
The element in period 7 and group 6 of the periodic table is
a. Uuh
b. At
c. Re
d. Sg
21.
A sample of a metal has a volume of 19.7 cm3 and a density of 0.0417 g/cm3, what is its mass?
a. 2.12 g
b. 0.00212 g
c. 472 g
d. 0.821 g
22.
Using the following conversions, calculate the number of quarts in 4.17 x 1011 cab.
18 cab = 1 ephah
2 lethek = 1 cor
1 peck = 8 quarts
5 ephah = 1 lethek
1 bushel = 4 peck
1 lethek = 3 bushels
a. 1.44 x 1014
b. 1.11 x 1012
c. 1.11 x 1013
d. 4.45 x 1011
23.
Molly completed the empirical formula lab and found that the molar mass of her sample was
74.2 g/mol. Mrs. Mullins said that her sample should have a molar mass of 89.4 g/mol. What
was Molly's percent error?
a. −17.0%
b. 20.5%
c. 17.0%
d. −20.5%
24.
What is the mass number for an element with 29 protons and 37 neutrons?
a. 8
b. 66
c. −8
d. −66
25.
Classify strontium as a metal, a nonmetal, or a metalloid.
a. metal
b. nonmetal
c. metalloid
d. medal
What is the molar mass of hydrotelluric acid?
a. 194 g/mol
b. 129 g/mol
c. 130. g/mol
d. 193 g/mol
What is the molar mass of nickel (III) fluorite?
a. 260. g/mol
b. 164 g/mol
c. 212 g/mol
d. 116 g/mol
26.
27.
28.
The Lanthanides and Actinides fill __________ orbitals on the periodic table.
a. s orbitals
b. p orbitals
c. d orbitals
d. f orbitals
29.
Choose the correct electron configuration for cerium.
a. 1s22s22p63s23p64s23d104p65s24d105p66s25d14f1
b. 1s22s22p63s23p63d104s24p64d104f15s25p65d16s2
c. 1s22s22p63s23p64s23d104p65s24d105p66s1
d. 1s22s22p63s23p63d104s24p64d105s25p66s1
30.
Classify the following reaction:
P2O5 + H2O → H3PO4
a. Synthesis
d. Double Displacement
b. Decomposition
e. Combustion
c. Single Displacement
31.
Choose the correct abbreviated electron configuration for rhenium.
a. [Kr] 5s24d73f14
b. [Xe] 6s25d5
c. [Kr] 5s24d7
d. [Xe] 6s25d54f14
32.
Classify the following reaction:
Zr(OH)4 + H3PO4 → H2O + Zr3(PO4)4
a. Synthesis
d. Double Displacement
b. Decomposition
e. Combustion
c. Single Displacement
33.
What is the coefficient of oxygen in the balanced reaction? C8H14 + O2 → CO2 + H2O
a. 11.5
b. 12
c. 23
d. 46
34.
Predict the product of a reaction between aluminum and nitrogen.
a. AlN
b. Al3N2
c. Al2N3
d. Al3N
35.
What is the percentage of water in cobalt (II) thiocyanate trihydrate?
a. 31.6%
b. 23.6%
c. 10.5%
d. 7.86%
36.
What is the percentage of nitrogen in barium cyanide?
a. 7.41%
b. 8.59%
c. 14.8%
d. 11.1%
37.
Hexacosylcyclohexane contains 85.5% carbon and 14.5% hydrogen. If the molar mass of
hexacosylcyclohexane is 449 g/mol, what is the molecular formula?
a. C32H64
b. C34H41
c. C31H77
d. C35H70
38.
Ferbam is an iron-containing compound. How many carbon atoms are contained in a sample
of 36.7 grams of Ferbam, (C9H18FeN3S6)?
a. 5.29 x 1022
b. 2.49 x 10 26
c. 1.29 x 10 24
d. 4.77 x 1023
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39.
How much does a sample of lead (IV) acetate weigh that contains 2.77 x 1027 hydrogen atoms?
a. 1.70 x 105 g
b. 2.45 x 1053 g
c. 2.45 x 107 g
d. 5.89 x 10 6 g
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40.
What is the name of the compound with the formula
a. silver (III) phosphate
c. silver phosphate
b. silver (I) phosphate
d. silver phosphite
Ag3PO4 ?
41.
What is the formula for tungsten (VI) carbonate?
a. W(CO3)2
b. W2(CO3)6
c. W(CO3)3
d. W3(CO3)6
42.
The oxoacid HBrO3 is named:
a. bromic acid
b. hydrobromic acid c. hypobromous acid d. hypobromic acid
43.
237
Np decays by alpha decay. What is the product?
a. 233Pa
b. 241Am
c. 236Np
d.
238
Np
44.
Complete and balance the following reaction:
tin (IV) hydroxide → ?????????
a. Sn(OH)4 → SnO2 + 2 H2O
c. 2 Sn(OH)4 → 2 SnO2 + 4 H2O
b. Sn(OH)2 → SnO2 + H2O
d. 2 Sn(OH)2 → 2 SnO2 + 2 H2O
45.
Complete and balance the following reaction:
C9H20 + O2 → ?????????
a. 2 C9H20 + 14 O2 → 9 CO2 + 10 H2O c. C9H20 + 14 O2 → 9 CO2 + 10 H2O
b. C9H20 + 28 O2 → 9 CO2 + 10 H2O
d. 2 C9H20 + 28 O2 → 9 CO2 + 10 H2O
46.
Describe the type of change that is occurring while steam condenses.
a. chemical
b. scientific
c. physical
d. matter
47.
Potassium is a member of the ________ family.
a. alkali metal
b. Group 17
c. halogen
d. noble gas
48.
The name of the compound N2O4 is:
a. tetranitrogen dioxide
c. dinitrogen tetroxide
b. nitrogen dioxide
d. dinitrogen monoxide
49.
Complete and balance the following reaction:
copper (I) phosphide + zinc → ??
a. CuP + Zn → ZnP + Cu
c. CuPO4 + Zn → ZnPO4 + Cu
b. 2 Cu3P + 3 Zn → Zn3P2 + 6 Cu
d. 2 Cu3PO4 + 3 Zn → Zn3(PO4)2 + 6 Cu
50.
What is the frequency of a wave whose velocity is 7.02 m/s and wavelength is 0.389 mm?
a. 1.80 x 101 Hz
b. 2.73 x 100 Hz
c. 1.80 x 104 Hz
d. 2.73 x 10 3 Hz
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