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Worksheetsbalance equations practice
Total questions: 12
Worksheet time: 24mins
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 TOTAL atoms are in the following chemical formula?
3H2O
3H2O
a)
7
b)
6
c)
9
d)
8
6.
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
7.
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
8.
Balance this equation...
HgO --> Hg + O2
HgO --> Hg + O2
a)
It is balanced
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
9.
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
10.
How many oxygens are in Al₂(SO₄)₃?
a)
4
b)
12
c)
7
d)
24
11.
When dry ice (solid carbon dioxide) sublimes it goes directly from a solid to a gas. What type of change is occurring?
a)
Chemical change
b)
Physical change
c)
None of the above
12.
How many oxygen atoms are present in the following?
4Ca(OH)2
4Ca(OH)2
a)
4
b)
6
c)
8
d)
1
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