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WorksheetsChemical equations, naming, parts and balancing
Total questions: 42
Worksheet time: 53mins
Name
Class
Date
1.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction.
2.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
3.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
4.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
5.
How many Mn atoms are found in the following compound?
3Cr(MnO4)6
3Cr(MnO4)6
a)
3
b)
4
c)
6
d)
18
6.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
7.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
8.
Element or compound?
H2O
H2O
a)
Element
b)
Compound
9.
Element or compound?
O2
O2
a)
Element
b)
Compound
10.
What is the number before a chemical formula called?
Ex: 2H2 + O2 --> 2H2O
Ex: 2H2 + O2 --> 2H2O
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
11.
How many aluminum atoms are in Al2(SO4)3?
a)
1
b)
2
c)
3
d)
4
12.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HClO3
d)
H2O
13.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
14.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
15.
Is the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2
NaHCO3 --> Na2CO3 + H2O + CO2
a)
yes
b)
no
16.
Which of the following equations are correctly balanced?
a)
12CO2 +H2O --> C6H12O6 + O2
b)
CO2 + 9H2O --> C6H12O6 + O2
c)
CO2 + H2O --> 3C6H12O6 + O2
d)
6CO2 + 6H2O --> C6H12O6 + 6O2
17.
The coefficient in 3H2O is
a)
6
b)
5
c)
2
d)
3
18.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
19.
Which is not a pattern of covalent compounds?
a)
they end in -ide
b)
they have Roman Numerals
c)
they have nonmetals only
d)
they have prefixes
20.
What does the Roman Numeral in the name of a multivalent compound represent?
a)
the charge on the anion
b)
the charge on the cation
c)
the number of cations
d)
the number of metal ions
21.
What is the name of Ca3N2?
a)
calcium nitrogen
b)
carbon nitrogen
c)
calcium nitride
d)
carbon nitrate
22.
Carbon monoxide is a deadly gas produced from incomplete combustion. What type of compound is it?
a)
covalent
b)
simple ionic
c)
polyatomic ionic
d)
multivalent ionic
23.
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
24.
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
25.
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
26.
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
27.
The number to the lower right of an element that shows the number of atoms bonded is called ?
a)
Product
b)
Subscript
c)
Chemical Formula
d)
Reactant
28.
One or two letters that represent the elements on the periodic table is called?
a)
The Chemical Formula
b)
The Chemical Equation
c)
The Chemical Symbol
d)
Coefficient
29.
What is a Yield in a chemical reaction?
a)
The arrow that separates the product from the reactant.
b)
The end result of a chemical reaction.
c)
The number before a chemical formula that shows the number of molecules present.
d)
A written description of a chemical reaction.
30.
The number before a chemical formula that shows the number of molecules present is call a?
a)
Yield
b)
Product
c)
Coefficient
d)
Reactant
31.
_________ describes the number of elements in a compound.
a)
chemical symbol
b)
chemical formula
c)
chemical equation
d)
coefficient
32.
______ is the end result of a chemical reaction.
a)
Product
b)
Yield
c)
Subscript
d)
Reactant
33.
2 NaBr + 1 Ca(OH)2 ----> 1 CaBr2 + 2 NaOH
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
34.
2 NH3+ 1 H2SO4 ----> 1 (NH4)2SO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
35.
Pb + FeSO4 ----> PbSO4 + Fe
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
36.
Na3PO4 + 3 KOH ----> 3 NaOH + K3PO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
37.
CaCO3 ----> CaO + CO2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
38.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
39.
Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
40.
Which of the following is the general formula for a decomposition reaction?
a)
A + B → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
41.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO
N2+O2--> _NO
a)
1
b)
2
c)
3
d)
4
42.
NH3 + HCl ---> NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
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