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WorksheetsFINAL REVIEW 2
Total questions: 54
Worksheet time: 2hrs 38mins
Name
Class
Date
1.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
2.
How many moles are in 16.94g of water?
a)
16.94
b)
0.9403
c)
305.2
d)
1.063
3.
What is the mass of 1.2 moles of IrI3?
a)
570 g
b)
690 g
c)
320 g
d)
957 g
4.
What is the molar mass of B2(CO3)3?
a)
81.632 g/mol
b)
94.842 g/mol
c)
38.822 g/mol
d)
201.648 g/mol
5.
Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?
a)
1 g Ti / 47.84 mol Ti
b)
1 mol Ti / 47.84 g Ti
c)
47.84 mol / 1 g Ti
d)
47.87 g Ti / 1 mol Ti
6.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
7.
What is the molar mass of (NH4)2CO3 ?
a)
144 g
b)
138 g
c)
96 g
d)
78 g
8.
The empirical formula for a compound that contains 36 g C, 8.0 g O, and 6.0 g H is
a)
C4H6O
b)
C6H12O
c)
C9H2O4
d)
C6H12O6
9.
A compound is found to have 52.0 g of zinc (Zn), 9.6 g of carbon (C), and 38.4 g of oxygen (O). What is the empirical formula?
a)
Zn2(CO3)2
b)
Zn2C2O6
c)
ZnCO
d)
ZnCO3
10.
The percent composition, by mass, of nicotine is 74.1% C, 8.60% H and 17.3% N. The molar mass of nicotine is 162 g/mol. Determine the molecular mass of nicotine.
a)
C10H14N2
b)
C5H7N
c)
C17H43N4
d)
C20H28N4
11.
Based on the info below, solve for the molecular formula:
Empirical formula = NO
Molecular formula mass = 59.98g
Empirical formula = NO
Molecular formula mass = 59.98g
a)
NO
b)
N2O3
c)
N2O2
d)
N4O4
12.
Find the percentage composition of Mg in Mg3(PO4)2.
a)
27.75% Mg
b)
23.57% Mg
c)
48.68% Mg
d)
13.45% Mg
13.
Mg + 2HCl -> MgCl2 + H2 is a
a)
synthesis reaction.
b)
single replacement reaction.
c)
decomposition reaction.
d)
double replacement reaction.
14.
Two or more substances combine to form one substance in a
a)
synthesis reaction.
b)
single replacement reaction.
c)
decomposition reaction.
d)
double replacement reaction.
15.
During a chemical reaction,
a)
new elements are produced.
b)
atoms are destroyed.
c)
atoms are rearranged.
d)
elements are destroyed.
16.
The empirical formula for a compound that contains 36 g C, 8.0 g O, and 6.0 g H is
a)
C4H6O
b)
C6H12O
c)
C9H2O4
d)
C6H12O6
17.
The molecular formula for a compound with a molar mass of 472.2 g/mol and an empirical formula of HgCl is
a)
HgCl
b)
Hg2Cl2
c)
Hg2Cl
d)
HgCl2
18.
Avogadro's number is equal to:
a)
6.02 x 1023
b)
6.02 x 10
c)
6.02 x 1020
d)
6.02 x 1022
19.
Which of the following reactions is a combustion reaction ?
a)
MgCO3 + O2 → MgO + CO2
b)
C3H8 + 5O2 → 3CO2 + 4H2O
c)
6CO2 + 6H2O → C6H12O6 + 6O2
d)
6CO2 + 6H2O → C6H12O6 + 6O2
20.
What is the law of Conservation of Mass?
a)
A measure of how much mass is created or destroyed.
b)
Mass can neither be created nor destroyed during a chemical reaction.
21.
Which of the following is a decomposition reaction?
a)
MgCo3 --> MgO + CO2
b)
SO3 + H2O --> H2SO4
c)
2 Mg + O2 --> 2MgO
22.
The compounds or elements present at the end of a reaction
a)
reactants
b)
catalyst
c)
products
d)
energy
23.
A chemical change happens when...
a)
a substance is changed at the atomic level
b)
bonds are broken and formed
c)
a new substance is made
d)
all of the above!
24.
Which is an empirical formula?
a)
N2H4
b)
H2O2
c)
H2O
d)
C6H6
25.
How many total atoms are in 4 Ca3(PO4)2?
a)
20
b)
36
c)
40
d)
52
26.
Which compound has a molar mass of 174.3 g/mol?
a)
Al(NO3)3
b)
MgCO3
c)
K2SO4
d)
Ca(NO3)2
27.
Which of the following is a synthesis reaction?
a)
2H2O --> 2H2 + O2
b)
MgCO3 → MgO + CO2
c)
H2 + O2 → 2H2O
28.
Which of the following reactions is a combustion reaction ?
a)
MgCO3 + O2 → MgO + CO2
b)
C3H8 + 5O2 → 3CO2 + 4H2O
c)
6CO2 + 6H2O → C6H12O6 + 6O2
d)
6CO2 + 6H2O → C6H12O6 + 6O2
29.
Chemical Formulas ...
a)
are written in alphabetical order
b)
represent the destruction or creation of atoms
c)
represent how atoms are arranged in a chemical reaction
30.
The compounds and elements that are present at the beginning of a reaction:
a)
reactants
b)
catalyst
c)
products
d)
energy
31.
A chemical reaction that produces energy is a /an
a)
endothermic reaction
b)
exothermic reaction
c)
energy
d)
chemical reaction
32.
Which of the following is a decomposition reaction?
a)
MgCo3 --> MgO + CO2
b)
SO3 + H2O --> H2SO4
c)
2 Mg + O2 --> 2MgO
33.
In the equation below , what are the PRODUCTS
2 H2 + O2 → H2O
2 H2 + O2 → H2O
a)
2 H2 + O2
b)
H2O
34.
In the equation below, what are the reactants
2 H2 + O2 → H2O
2 H2 + O2 → H2O
a)
H2O
b)
2 H2 + O2
35.
Will the following reaction take place?
AuNO3 + Li ->
AuNO3 + Li ->
a)
yes
b)
no
36.
Which type of reaction starts with a single reactant? (AB > A + B)
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
37.
Which type of reaction is this?
2Na + Cl2 > 2NaCl
2Na + Cl2 > 2NaCl
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
38.
Which type of chemical reaction is this?
P4O6 + 6H2O > 4H3PO3
P4O6 + 6H2O > 4H3PO3
a)
synthesis
b)
decomposition
c)
combustion
d)
double displacement
39.
Which type of chemical reaction is this?
2C2H6 + 5O2 > 4CO2 + 6H2O
2C2H6 + 5O2 > 4CO2 + 6H2O
a)
single displacement
b)
double displacement
c)
combustion
d)
synthesis
40.
HgO --> Hg + O2
a)
Synthesis
b)
Decomposition
c)
Single
d)
Double
41.
NaCl + AgNO3 --> NaNO3 + AgCl
a)
Decomposition
b)
Synthesis
c)
Single
d)
Double
42.
Mg + HCl --> MgCl2 + H2
a)
Single
b)
Double
c)
Combustion
d)
Synthesis
43.
Zn + H2SO4 --> ZnSO4 + H2
a)
Combustion
b)
Single
c)
Double
d)
Decomposition
44.
NaOH + HCl --> NaCl + H2O
a)
Double
b)
Single
c)
Decomposition
d)
Combustion
45.
Al2(SO4)3+ Ca(OH)2 --> Al(OH)3 + CaSO4
a)
Synthesis
b)
Decomposition
c)
Single
d)
Double
46.
H2 + O2 --> H2O
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single
47.
Cl2 + NaBr --> NaCl + Br2
a)
Single
b)
Combustion
c)
Double
d)
Decomposition
48.
C6H12 + 9O2 --> 6CO2 + 6H2O
a)
Synthesis
b)
Single
c)
Combustion
d)
Double
49.
C6H12 + 9O2 --> 6CO2 + 6H2O
a)
Synthesis
b)
Single
c)
Combustion
d)
Double
50.
Zn + CuSO4 --> ZnSO4 + Cu
a)
Single
b)
Double
c)
Combustion
d)
Decomposition
51.
H2O + Fe --> Fe2O3 + H2
a)
Double
b)
Single
c)
Decomposition
d)
Combustion
52.
Name this compound: Ti(SO3)2
a)
Titanium sulfate
b)
Titanium (II) sulfite
c)
Titanium (IV) sulfite
d)
Titanium (II) sulfate
53.
Ca + I2 --> CaI2
a)
Decomposition
b)
Synthesis
c)
Single
d)
Combustion
54.
K + AlCl3 --> KCl + Al
a)
Double
b)
Single
c)
Combustion
d)
Decomposition
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