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WorksheetsWriting,Balancing and Classifying Chemical Equations
Total questions: 65
Worksheet time: 1hrs 16mins
Name
Class
Date
1.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
2.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
3.
Si + S8 --> Si2S4
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
4.
Ca + AlCl3 --> CaCl2 + Al
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
5.
C3H8 + O2 --> H2O + CO2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
6.
Mg + N2 --> Mg3N2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
7.
What will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
8.
The coefficient in 3H2O is
a)
6
b)
2
c)
3
d)
5
9.
If reaction starts with 20g of reactants it should produce
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
10.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same number of atoms
c)
Same subscripts
d)
Same coefficients
11.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
12.
In the following equation, what are the products?
HCl + Zn → H2 + ZnCl2
HCl + Zn → H2 + ZnCl2
a)
HCl + Zn
b)
H2 + ZnCl2
c)
Zn → H2
d)
the stuff on the outside
13.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
14.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
15.
Fill in the blank to balance the chemical equation.
2KI + ____Cl2 → 2KCl + I2
2KI + ____Cl2 → 2KCl + I2
a)
1
b)
2
c)
3
d)
4
16.
What coefficient should go in the blank space to balance the chemical equation?
2Al +____ HCl → 2AlCl3 + 3H2
2Al +____ HCl → 2AlCl3 + 3H2
a)
2
b)
4
c)
3
d)
6
17.
Which equation shows magnesium sulfate plus sodium carbonate?
a)
MgSO4 + Na2CO3
b)
MgCO3+ Na2SO4
c)
MgNa2 + CO3SO4
d)
Mg + S + Na + C
18.
Name the following ionic compound: MgSO4
a)
magnesium sulfoxide
b)
magnesium sulfide
c)
magnesium sulfate
d)
magnesium oxide
19.
LiBr is called
a)
lithium bromine
b)
lithium (I) bromine
c)
lithium bromide
d)
lithuim (I) bromide
20.
calcium phosphate
a)
CaPO4
b)
Ca2(PO4)3
c)
Ca3PO4
d)
Ca3(PO4)2
21.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
22.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
23.
Balance this equation...
HgO --> Hg + O2
HgO --> Hg + O2
a)
It is balanced
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
d)
I don't know...Oh well!
24.
Which coefficients balance this equation:
NH3 + O2 ----> NO + H2O
NH3 + O2 ----> NO + H2O
a)
2,3,5,6
b)
5,5,4,6
c)
4,6,4,5
d)
4,5,4,6
25.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
26.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
27.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
28.
Magnesium reacts with water to produce magnesium hydroxide and hydrogen gas.
Which of the following shows the balanced chemical equation for this reaction?
a)
Mg + H2O → MgOH + H2
b)
Mg + 2H2O → Mg(OH)2 + H2
c)
2Mg + H2O → MgOH2 + H2
d)
2Mg + 2H2O → Mg(OH)2 + 2H2
29.
Which of the following is an ionic compound:
a)
CH4
b)
I2
c)
LiBr2
d)
CO
30.
What would be the proper chemical formula for combining Al3+ and Cl- :
a)
AlCl3
b)
Al3Cl
c)
AlCl
d)
Al3Cl3
31.
Name the following ionic compound: BeCl2
a)
beryllium chlorine
b)
beryllium II chloride
c)
beryllium chloride
d)
beryllium dichloride
32.
name the following ionic compound: NaF
a)
nitrogen fluorine
b)
sodium fluoride
c)
nitrogen fluoride
d)
sodium fluorine
33.
Name the following ionic compound: Cs2S
a)
cesium sulfide
b)
cesium sulfate
c)
cesium II sulfate
d)
cesium II sulfide
34.
What is the charge on the hydroxide ion?
a)
0
b)
-1
c)
-2
d)
-3
35.
When naming ionic compounds with transition metals you need to include roman numerals to show the _____ of the metal..
a)
atomic number
b)
mass number
c)
charge
d)
ionization energy
36.
How do the following two elements bond together?
Al3+ O2-
Al3+ O2-
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
37.
The chemical formula of Iron (III)bromide is
a)
FeBr
b)
Fe(III)Br
c)
FeBr₃
d)
Fe₂Br₃
38.
What is the formula for Calcium phosphide?
a)
CaP
b)
Ca2P3
c)
Ca3P2
d)
Ca2P
39.
The chemical formula for CaS is
a)
Cerium sulfide
b)
Carbon sulfur
c)
Calcium sulfide
d)
Calcium sulfur
40.
If a sulfate ion has a charge of 2-, how many sodium ions will combine with one sulfate ion?
a)
1
b)
2
c)
3
d)
2.5
41.
An ionic compound is formed between
a)
Metal anion(s) and non-metal cation(s)
b)
Two or more metal atoms
c)
Metal cation(s) and non-metal anion(s)
d)
Two or more non-metal atoms
42.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invisible
43.
What charge will an Oxygen ion have?
a)
+1
b)
-1
c)
+2
d)
-2
44.
When naming a compound, which of these is written first?
a)
Metal
b)
Nonmetal
c)
Anion
d)
Cation
45.
When naming a compound, what must the last part be?
a)
the element with "ide" at the end
b)
the element with the ending "ite"
c)
the name of the element
d)
the element with "ide" at the end, unless its a polyatomic ion
46.
What is the name of the compound CaF2?
a)
Calcium fluoride
b)
Calcium fluorine
c)
Calcium difluoride
d)
Cadmium fluoride
47.
What is the name of N2O3
a)
Nitrogen trioxide
b)
Dinitrogen oxide
c)
Dinitrogen trioxide
d)
Nitrogen oxide
48.
What is the chemical formula for Tetrasulfur pentoxide?
a)
SO
b)
S4O
c)
S4O5
d)
S5O4
49.
What is the name of C3Cl8 ?
a)
Carbon octachloride
b)
Tricarbon octachloride
c)
Carbon trichloride
d)
Octacarbon trichloride
50.
What is the chemical formula for Tetraphosphorous Pentachloride ?
a)
4P5Cl
b)
PCl
c)
P4Cl5
d)
none of the above
51.
What is the name of CO
a)
Carbon oxide
b)
Carbon dioxide
c)
Carbon monoxide
d)
Carbon II oxide
52.
What is the chemical formula for Fluorine trisulfide ?
a)
S3F
b)
FS3
c)
FS
d)
none of the above
53.
What is the name of NO3 ?
a)
Nitrogen trioxide
b)
Nitrogen oxide
c)
Mononitrogen oxide
d)
Mononitrogen dioxide
54.
What is the name of S2I4 ?
a)
Sulfur iodide
b)
Disulfur iodide
c)
Sulfur tetraiodide
d)
none of the above
55.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
56.
How many electrons are shared in a single covalent bond?
a)
2 pairs
b)
4
c)
2
d)
1
57.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
58.
Name this compound.
N2O
N2O
a)
Dinitrogen monoxide
b)
Dinitrogen oxide
c)
Nitrogen oxide
d)
Nitrogen dioxide
59.
What is the prefix for 10:
a)
deca-
b)
nona-
c)
septa-
d)
hexa-
e)
hepta-
60.
What is the prefix for 5:
a)
penta-
b)
di-
c)
tetra-
d)
hexa-
e)
hepta-
61.
What is the prefix for 8:
a)
octa-
b)
nona-
c)
septa-
d)
hexa-
e)
hepta-
62.
What is the prefix for 7:
a)
penta-
b)
nona-
c)
septa-
d)
hexa-
e)
hepta-
63.
What is the prefix for 4:
a)
quad-
b)
di-
c)
tetra-
d)
tri-
e)
hepta-
64.
True or False: Should you include the prefix MONO when writing the name for the compound SiO2
a)
yes - its "monosilicon dioxide"
b)
no - its "silicon dioxide"
65.
Which of the following is a covalent compound?
a)
KCl
b)
NaCl
c)
HCl
d)
BeCl2
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