NEW
Font size
S
M
L
XL
WorksheetsFINAL REVIEW
Total questions: 39
Worksheet time: 1hrs 14mins
Name
Class
Date
1.
What type of chemical reaction is this one?
Al(OH)3 --> Al2O3 + H2O
Al(OH)3 --> Al2O3 + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
2.
What type of chemical reaction is this one?
CUO + CO2 --> CuCO3
CUO + CO2 --> CuCO3
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
3.
What type of chemical reaction is this one?
Ca + MgCl2 --> CaCl2 + Mg
Ca + MgCl2 --> CaCl2 + Mg
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
4.
What type of chemical reaction is this one?
C2H2 + O2 --> CO2 + H2O
C2H2 + O2 --> CO2 + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement
5.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
6.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
not true
c)
obeyed
d)
used sometime
7.
name this reaction, Ca + O --> CaO
a)
Decomposition
b)
Single Replacement
c)
Double Replacement
d)
Combustion
8.
Name this reaction, Cl2 + 2KI --> I2 + 2KCl
a)
Synthesis
b)
Single Replacement
c)
Double Replacement
d)
Decomposition
9.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
10.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
11.
In a Chemical Reaction, the Law of Conservation of Mass states?
a)
Matter is present.
b)
Matter is NOT created or destroyed.
c)
Matter is created and destroyed.
12.
Which is NOT an example of chemical change?
a)
production of gas.
b)
change in color.
c)
change in size.
d)
transfer of energy.
13.
Which is a Synthesis Reaction?
a)
A + B ----> AB
b)
AB -----> A + B
14.
Which is a Decomposition Reaction?
a)
AB --> A + B
b)
ab ----> a + B
15.
What is a chemical formula?
a)
A mathematical equation based on atomic numbers
b)
A equation used to find an element's valence
c)
Uses chemical symbols to represent the atoms of elements and their ratios in a chem. compound
16.
_________________ are the elements and compounds that enter into a chemical reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
17.
Chemical reactions that release energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Reactions
18.
Chemical reactions that absorb energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Explosive
19.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
20.
Which is the correct formula for:
one carbon (C)
two oxygen (O)
one carbon (C)
two oxygen (O)
a)
CO2
b)
CO
c)
C2O
d)
2CO
21.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
22.
___________________ are the elements or compounds that are formed in a chemical
reaction.
reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
23.
Compounds break down into simpler substances in this type of reaction.....
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
24.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
25.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
26.
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
27.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
28.
Which has a greater mass: 1 mole of scandium or 2 moles of boron?
a)
scandium
b)
boron
c)
neither
d)
more information is needed.
29.
What is the mass of 2.50 mol of oxygen gas O2?
a)
40 g
b)
80 g
c)
16 g
d)
32 g
30.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
31.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
32.
What is the molar mass of (NH4)2CO3 ?
a)
144 g
b)
138 g
c)
96 g
d)
78 g
33.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
34.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1304 x 1024
d)
8.638 x 10-24
35.
What is the empirical formula of a compound if the molecular formula is W18O9?
a)
W18O9
b)
W2O
c)
W6O3
d)
none of the above
36.
What is the empirical formula of a compound if the molecular formula is W18O9?
a)
W18O9
b)
W2O
c)
W6O3
d)
none of the above
37.
What is the percent composition of a compound that contains 40.8 g carbon and 54.4 g oxygen?
a)
42.9 % carbon; 57.1% oxygen
b)
57.1 % carbon; 42.9 % oxygen
c)
40.8 % carbon; 54.4 % oxygen
d)
54.4 % carbon; 40.8% oxygen
38.
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
39.
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
Reset
