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WorksheetsChemical Reactions
Total questions: 44
Worksheet time: 3hrs 22mins
Name
Class
Date
1.
What are the reactants in the following chemical equation?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
H2
b)
O2
c)
2H2 + O2
d)
2H2O
2.
What are the products in the following chemical equation?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
H2
b)
O2
c)
2H2 + O2
d)
2H2O
3.
The Law of Conservation of Mass states that ALL matter....
a)
can be created and destroyed
b)
cannot be created nor destroyed but can change form
c)
cannot be created nor destroyed but can be transfered
d)
can be created but not destroyed
4.
Coefficients tell us how many ________ there are of an element in a compound.
a)
Elements
b)
Atoms
c)
Molecules
5.
Subscripts are the _________ numbers in a chemical formula.
a)
Smaller
b)
Larger
6.
Coefficients are the _________ numbers in a chemical formula.
a)
Smaller
b)
Larger
7.
On the left side of a chemical reaction are the ....
a)
Reactants
b)
Products
8.
On the right side of a chemical reaction are the ....
a)
Reactants
b)
Products
9.
On the left side of a chemical equation are the .....
a)
Reactants
b)
Products
10.
How many ELEMENTS are in the compound H2O
a)
1
b)
2
c)
3
d)
4
11.
How many ELEMENTS are in the compound O2
a)
1
b)
2
c)
3
d)
4
12.
How many ELEMENTS are in the compound C6H12O6
a)
1
b)
2
c)
3
d)
4
13.
How many ATOMS of Carbon are in 3C2H4O
a)
2
b)
3
c)
4
d)
6
14.
How many ATOMS of Oxygen are in 3Fe2O3
a)
2
b)
3
c)
6
d)
9
15.
How many TOTAL atoms are in 2H2SO4
a)
2
b)
4
c)
7
d)
14
16.
How many TOTAL atoms are in 2CaO2
a)
2
b)
3
c)
5
d)
6
17.
What is the name of the following element?
Na
Na
a)
Sodium
b)
Sulfur
c)
Potassium
d)
Zinc
18.
What is the name of the following element?
K
K
a)
Hydrogen
b)
Sulfur
c)
Potassium
d)
Zinc
19.
What is the name of the following element?
Cu
Cu
a)
Carbon
b)
Calcium
c)
Copper
d)
Zinc
20.
What is the name of the following element?
Cl
Cl
a)
Carbon
b)
Chlorine
c)
Copper
d)
Zinc
21.
What is the name of the following element?
Ag
Ag
a)
Silver
b)
Chlorine
c)
Gold
d)
Zinc
22.
Is the following equation balanced or unbalanced ?
Al + O2 --> Al2O3
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
23.
Is the following equation balanced or unbalanced ?
N2 +3 H2 --> 2NH3
N2 +3 H2 --> 2NH3
a)
Balanced
b)
Unbalanced
24.
Is the following equation balanced or unbalanced ?
2HgO --> Hg + O2
2HgO --> Hg + O2
a)
Balanced
b)
Unbalanced
25.
Can only be changed into simpler substances called elements by chemical change
a)
Compound
b)
Element
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
26.
Composed of two or more different substances that retain their own indiviural properties and are combined physically (mixed together)
a)
Compound
b)
Element
c)
Mixture
d)
Homogeneous Mixture
27.
Pure substance that cannot be changed into simpler substances
a)
Compound
b)
Element
c)
Mixture
d)
Homogeneous Mixture
28.
Composed of one kind of atom
a)
Compound
b)
Element
c)
Mixture
d)
Homogeneous Mixture
29.
Composed of one kind of atom
a)
Compound
b)
Element
c)
Mixture
d)
Homogeneous Mixture
30.
A mixture that can be separated by physical means and individual parts can be seen.
a)
Compound
b)
Element
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
31.
A mixture where substances are evenly mixed and cannot be visibly distinguished.
a)
Compound
b)
Element
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
32.
Classify the following:
Na
Na
a)
Element
b)
Compound
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
33.
Classify the following:
Salad
Salad
a)
Element
b)
Compound
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
34.
Classify the following:
Water (H2O)
Water (H2O)
a)
Element
b)
Compound
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
35.
Classify the following:
Coffee
Coffee
a)
Element
b)
Compound
c)
Heterogeneous Mixture
d)
Homogeneous Mixture
36.
What is the common name for C6H12O6
a)
Sugar
b)
Glucose
c)
Water
d)
Carbon Dioxide
37.
What is the common name for Fe2O3
a)
Salt
b)
Glucose
c)
Rust
d)
Carbon Dioxide
38.
What is the common name for O2
a)
Oxygen
b)
Glucose
c)
Oxygen Gas
d)
Carbon Dioxide
39.
What type of bond SHARES electrons ?
a)
Ionic
b)
Covalent
40.
What type of bond TRANSFERS electrons ?
a)
Ionic
b)
Covalent
41.
What type of bond occurs between two NONMETALS ?
a)
Ionic
b)
Covalent
42.
What type of bond occurs between METALS AND NONMETALS ?
a)
Ionic
b)
Covalent
43.
What type of bond occurs in H2O?
a)
Ionic
b)
Covalent
44.
What type of bond occurs in NaCl?
a)
Ionic
b)
Covalent
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