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WorksheetsChemical Equations
Total questions: 17
Worksheet time: 12mins
Name
Class
Date
1.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
2.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
3.
Element or compound?
H2O
H2O
a)
element
b)
compound
4.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
5.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
6.
How many TOTAL atoms are in the following chemical formula?
3H2O
3H2O
a)
7
b)
6
c)
9
d)
8
7.
What is the Law of Conservation of Mass?
a)
It states that no matter can be created or destroyed.
b)
It states that no energy can be created or destroyed.
c)
It states that matter can be created or destroyed.
d)
It states that no sound can be created or destroyed.
8.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
9.
Which of the following models best demonstrates a balanced chemical equation?
a)
F
b)
G
c)
H
d)
J
10.
Why must chemical equations be balanced?
a)
So that the equation doesn't explode
b)
The reaction won't happen until it is balanced
c)
Based on the Law of Conservation of Matter, matter cannot be created or destroyed.
d)
Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e
11.
How many atoms of hydrogen (H), sulfur (S), and oxygen (O) are there in sulfuric acid (H2SO4)?
a)
H-6, S-4, O-4
b)
H-1, S-2, O-8
c)
H-2, S-1, O-4
d)
H-2, S-4, O-4
12.
Chemical reactions occur when _________ are broken and new bonds are formed.
a)
mixtures
b)
osteoclasts
c)
physical bonds
d)
chemical bonds
13.
Balance this equation...
HgO --> Hg + O2
HgO --> Hg + O2
a)
It is balanced
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
14.
Balance this equation...
H2 + Cl2 --> HCl
H2 + Cl2 --> HCl
a)
It is balanced
b)
3H2 + Cl2 --> 6H2Cl
c)
H2 + Cl2 --> 2HCl
15.
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO
a)
Mg and O2
b)
MgO
c)
Mg and MgO
d)
O2 and MgO
16.
How many oxygens are in Al₂(SO₄)₃?
a)
4
b)
12
c)
7
d)
24
17.
Which of the following is NOT an indication of a chemical reaction?
a)
new gas formed
b)
temperature change
c)
new smell detected
d)
two liquids form a mixture
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