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WorksheetsAP Chem Exam Review
Total questions: 70
Worksheet time: 1hrs 10mins
Name
Class
Date
1.
In the picture, what is the atomic number for Sodium?
a)
11
b)
22.9
c)
Na
d)
none of the above
2.
A mixture would best be represented by what candy?
a)
M&M's
b)
Snickers
c)
Reese's
d)
Kit Kat
3.
A group on a periodic table (18 groups) means the elements have?
a)
similar reactions (properties)
b)
different reactions (properties)
c)
doesn't matter
4.
How many significant figures: 153.0 mL
a)
1
b)
2
c)
3
d)
4
5.
How many significant figures: 0.012 km
a)
1
b)
2
c)
3
d)
4
6.
How many significant figures: 1000 mL
a)
1
b)
2
c)
3
d)
4
7.
How many significant figures: 100.000 cL
a)
1
b)
3
c)
5
d)
6
8.
How many significant figures: 0.001 g
a)
4
b)
3
c)
2
d)
1
9.
How many significant figures: 4.20 cm
a)
1
b)
2
c)
3
d)
4
10.
How many significant figures: 450 m
a)
3
b)
2
c)
1
d)
0
11.
How many sig figs are there?
100000000
100000000
a)
1
b)
9
c)
10
12.
How many sig figs are in the following measurements?
2.4050 X 10-3
a)
1
b)
2
c)
3
d)
4
e)
5
13.
How many sig figs are in the following measurements?
300 100 000 g
a)
0
b)
2
c)
4
d)
9
14.
Round each number to 3 significant figures.
24 501 759
a)
245
b)
245000
c)
24600000
d)
2.45 x 107
15.
Determine the number with the fewest significant figures.
a)
5.78 910 x 103 g
b)
5000 panthers
c)
12.90 s
d)
0.121 012 L
16.
Complete the following calculations. Round off your answers as needed.
52.6 g + 309.1 g +77.214 g
a)
438.9
b)
438.914
c)
438.91
d)
4.38914 x 102
17.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H2O --> __NaOH + __H2
a)
2,2 --> 2,1
b)
4,4 --> 4,1
c)
1,2 --> 2,4
d)
1,2 --> 2,1
18.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?
__Ca + __H2O --> __Ca(OH)2 + __H2
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 2,4
d)
1,2 --> 2,1
19.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO2
a)
3,1 --> 2,3
b)
3,2 --> 1,1
c)
3,2 --> 2,4
d)
3,2 --> 2,1
20.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH4 + __O2 --> __CO2+ __H2O
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
21.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__AgNO3 + __H2S --> __Ag2S+ __HNO3
a)
2,1 --> 1,2
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
22.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2SO3 + __KOH--> __H2O+ __K2SO3
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
23.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Al + __O2--> __Al2O3
a)
4,1 --> 2
b)
4,3 --> 4
c)
3,4 --> 1
d)
4,3 --> 2
24.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__FeCl3 + __Ca(OH)2 --> __Fe(OH)3 + __CaCl2
a)
4,3--> 2,1
b)
3,2 --> 3,1
c)
2,3 --> 2,2
d)
2,3 --> 2,3
25.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
26.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
27.
Balance this equation:
P4+O2 --> P2O3
P4+O2 --> P2O3
a)
3 P4+ O2 --> 2 P2O3
b)
P4+ O2 --> 2 P2O3
c)
P4+ 3 O2 --> 2 P2O3
d)
P4+ 2 O2 --> 3 P2O3
28.
Balance the equation:
Si(OH)4+NaBr--> SiBr4+NaOH
Si(OH)4+NaBr--> SiBr4+NaOH
a)
Si(OH)4+2NaBr--> SiBr4+NaOH
b)
Si(OH)4+4NaBr--> SiBr4+4NaOH
c)
Si(OH)4+NaBr--> SiBr4+4NaOH
d)
Si(OH)4+2NaBr--> SiBr4+2NaOH
29.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
30.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
31.
What is the electron configuration of Sulfur using noble gas method
a)
[Ne]3s1
b)
[Ne]3s23p3
c)
[Ne]3s23p4
32.
What is the electron configuration of Iodine?
a)
[Kr]5s24d105p6
b)
[Kr]5s24d106p6
c)
[Kr]5s25d106p6
d)
None of the above
33.
What atom matches this electron configuration?
[Xe] 6s24f145d9
a)
Mercury
b)
Gold
c)
Platinum
d)
Thallium
34.
Which element is pictured?
a)
neon
b)
fluorine
c)
magnesium
d)
argon
35.
How many atomic orbitals are there in the p sublevel?
a)
2
b)
3
c)
4
d)
5
36.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
37.
Which electron configuration belongs to Chlorine (Cl)?
a)
1s2 2s2 2p6 3s2 3p5
b)
1s2 2s2 2p6 3s2 3p6
c)
1s2 2s2 2p6 3s2 3p7
38.
Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?
a)
Hund’s Rule
b)
Aufbau Principle
c)
Pauli Exclusion Principle
39.
Electron arrangement that uses arrows
a)
Electron configuration
b)
Shorthand configuration
c)
Lewis dot structure
d)
Orbital diagram
40.
What does Pauli exclusion principle state ?
a)
states that each electron occupies the lowest energy orbital available
b)
states that a maximum of two electrons can occupy a single atomic orbital, but if only if the electros have opposite spins
c)
states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals
41.
What does Hund's rule states ?
a)
states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals
b)
states that each electron occupies the lowest energy orbital available
c)
states that a maximum of two electrons can occupy a single atomic orbital, but if only if the electros have opposite spins
42.
How many d orbitals are there in a given sublevel?
a)
1
b)
3
c)
5
d)
7
43.
What is the percent by mass of magnesium in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
44.
What is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
a)
24%
b)
49%
c)
51%
d)
65%
45.
What is the percent composition by mass of oxygen in the compound MgSO4 (gram formula mass = 120 g/mol)?
a)
20%
b)
27%
c)
46%
d)
53%
46.
In which compound is the percent composition by mass of Cl equal to 42%?
a)
HClO (gram formula mass = 52 g/mol)
b)
HClO2 (gram formula mass = 68 g/mol)
c)
HClO3 (gram formula mass = 84 g/mol)
d)
HClO4 (gram formula mass = 100 g/mol)
47.
What are the products of this reaction?
Cu+ AgNO3-->
Cu+ AgNO3-->
a)
Cu(NO3)2+Ag
b)
CuNO3 + Ag
c)
CuAg+NO3
d)
Cu+ AgNO3
48.
Write a Balanced Equation for this reaction:
C2H4 + 2 O2 -->
C2H4 + 2 O2 -->
a)
C2O2 + H4
b)
CO2 + HOH
c)
CO + H
d)
2 CO2 + 2H2O
49.
What type of reaction is this?
2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
a)
Single Replacement
b)
Double Replacement
c)
Combustion
d)
Decomposition
50.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
51.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
52.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2
d)
MgN
53.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
a)
SO
b)
SO2
c)
SO3
d)
SO4
54.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
55.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2
d)
MgN
56.
What is the correct formula for the compound Phosphorus tribromide?
a)
P3Br
b)
PBr
c)
PBr3
d)
Br3P
57.
What is the correct name for the compound LiF?
a)
Lithium fluoride
b)
Lithium fluorine
c)
monolithium monofluoride
d)
lithium monofluoride
58.
What is the correct formula for Ammonium phosphate?
a)
NH4PO4
b)
NH43PO4
c)
(NH4)3PO4
d)
NH4(PO4)3
59.
What is the correct name of the compound Mg(NO3)2?
a)
Magnesium nitride
b)
Magnesium dinitrate
c)
Monomagnesium dinitrate
d)
Magnesium nitrate
60.
What is the correct formula for aluminum sulfide?
a)
Al3S2
b)
Al2S
c)
AlS2
d)
Al2S3
61.
What is the correct name of the compound NO2?
a)
Nitrogen oxide
b)
Mononitrogen dioxide
c)
Nitrogen dioxide
d)
Dinitrogen monoxide
62.
4 cm = ___mm
a)
400
b)
40
c)
4
d)
4,000
63.
180m = ___dm
a)
8
b)
18,000
c)
1,800
d)
18
64.
64,600,000 cm = ____ km
a)
646
b)
64.6
c)
6,460
d)
6.46
e)
64,600
65.
32.9 km = ___________ cm
a)
32,900
b)
329,000
c)
3,290,000
d)
32,900,000
66.
What is the formula for Lead II Phosphate?
a)
Pb₃(PO₃)₂
b)
Pb₃(PO₄)₂
c)
Pb₂PO₄
d)
Pb₂P
67.
When the equation for the following reaction in basic solution is balanced, what is the sum of the coefficients?
MnO2 + HO2- -> MnO4-
MnO2 + HO2- -> MnO4-
a)
18
b)
9
c)
14
d)
11
68.
subatomic particles found on the outermost shell & responsible for the atom's reactivity
a)
neutrons
b)
valence electrons
c)
isotopes
d)
ions
69.
Value representing the number of protons in an element
a)
Atomic Mass
b)
Mass Number
c)
Valence Electrons
d)
Atomic Number
70.
Atoms of the same element with a different number of neutrons
a)
Ion
b)
Gluons
c)
Isotope
d)
Quarks
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